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The document summarizes key topics in the history of life on Earth: 1) Fossils and dating techniques are used to determine the age of ancient organism remains found in the fossil record. 2) The geological time scale represents eras since the Precambrian period, with mammals dominating the current Cenozoic era. 3) The early Earth atmosphere contained gases like hydrogen cyanide and carbon dioxide, and life's organic compounds originally derived from these atmospheric compounds.
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3chapter17
The document summarizes key topics in the evolution of life on Earth including the fossil record, early Earth's atmosphere, the evolution of multicellular life, and patterns of evolution. It describes how the fossil record provides evidence of changes over time and how dating techniques determine the age of fossils. It also outlines the components of Earth's early atmosphere and how the rise of oxygen drove some extinctions but allowed new organisms to emerge. Finally, it summarizes the evolution of multicellular life from the Precambrian to the Cenozoic era and examples of macroevolutionary patterns such as mass extinction and adaptive radiation.
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The document discusses key concepts relating to life on Earth, including the biosphere, ecosystems, and biogeochemical cycles. The biosphere encompasses all life and interactions between the lithosphere, hydrosphere, and atmosphere. Ecosystems refer to interactions between living and non-living factors within a defined area. Major biogeochemical cycles, like the carbon, water, oxygen, and nitrogen cycles, involve the exchange and reuse of key elements between organisms and the environment.
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Fossils are formed through the mineral replacement or preservation of plant and animal remains over time. Relative dating methods determine the sequence of geological events without providing absolute ages, while absolute dating using radiometric methods like radiocarbon dating provides numerical ages by measuring radioactive decay. Mass extinctions have occurred throughout Earth's history, including the end-Cretaceous extinction that wiped out the dinosaurs. Key events in southern Africa include some of the earliest fossil evidence of life, mammal-like reptiles and dinosaurs from the Karoo and Drakensberg mountains, and early human ancestors like Australopithecus.
Precambrian geology
The document discusses the Precambrian Eon, which lasted over 4 billion years and comprised approximately 88% of geologic time. During the Precambrian, the Earth had a different atmosphere and hydrosphere than today. The earliest atmosphere was likely hydrogen and helium but was lost to space. Once Earth developed a magnetosphere, volcanism led to an atmosphere forming via outgassing, but it lacked free oxygen and an ozone layer, containing gases like carbon dioxide, ammonia and methane instead.
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The document describes the conditions on early Earth that enabled the origin of life and the key events in the evolution of life over billions of years. It explains that the early atmosphere differed from today's and was conducive to the abiotic synthesis of organic molecules. The earliest evidence of life comes from 3.5-billion-year-old fossils, and life may have originated as early as 3.9 billion years ago. Major events included the emergence of single-celled and then multicellular organisms, and plants and fungi colonizing land around 500 million years ago. Continental drift also played a role in shaping the diversity of life.
History Of The Earth
This document provides an overview of evolution on Earth from the earliest life forms to present day. It describes the major eras and events in life's history, including the earliest bacteria and multicellular organisms, the Cambrian explosion of diversification, the rise of plants and animals through the Palaeozoic, Mesozoic, and Cenozoic eras, several mass extinction events, and the radiation and dominance of mammals and modern species. The timeline spans from 4.5 billion years ago to the most recent ice age around 18,000 years ago.
Major extinction events
- An extinction event is a widespread decrease in biodiversity where the rate of extinction increases compared to the rate of evolution of new species. The "Big Five" mass extinction events are the five largest extinction events in Earth's history.
- The document then describes each of the "Big Five" extinction events by time period, percentage of families/genera/species that went extinct, and possible causes. The largest was the Permian-Triassic extinction about 252 million years ago where up to 96% of marine species went extinct.
- Possible causes of mass extinction events discussed are large igneous provinces (flood basalts), sea level falls, asteroid/comet impacts, and global cooling, with flood basalts
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The document discusses the physical environment and biogeochemical cycles on Earth. It defines the physical environment as natural features like mountains, rivers, forests, and divides it into the atmosphere, land, water, and living things. It then explains that biogeochemical cycles involve chemical substances moving through both biological and physical parts of Earth. Some of the most important cycles mentioned are the water, carbon, nitrogen, oxygen, rock, sulfur, and phosphorus cycles. The document also notes that mercury and human-caused cycles like atrazine are now being more closely studied due to climate change and human impacts.
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3chapter17
The document summarizes key topics in the evolution of life on Earth including the fossil record, early Earth's atmosphere, the evolution of multicellular life, and patterns of evolution. It describes how the fossil record provides evidence of changes over time and how dating techniques determine the age of fossils. It also outlines the components of Earth's early atmosphere and how the rise of oxygen drove some extinctions but allowed new organisms to emerge. Finally, it summarizes the evolution of multicellular life from the Precambrian to the Cenozoic era and examples of macroevolutionary patterns such as mass extinction and adaptive radiation.
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The document discusses key concepts relating to life on Earth, including the biosphere, ecosystems, and biogeochemical cycles. The biosphere encompasses all life and interactions between the lithosphere, hydrosphere, and atmosphere. Ecosystems refer to interactions between living and non-living factors within a defined area. Major biogeochemical cycles, like the carbon, water, oxygen, and nitrogen cycles, involve the exchange and reuse of key elements between organisms and the environment.
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Fossils are formed through the mineral replacement or preservation of plant and animal remains over time. Relative dating methods determine the sequence of geological events without providing absolute ages, while absolute dating using radiometric methods like radiocarbon dating provides numerical ages by measuring radioactive decay. Mass extinctions have occurred throughout Earth's history, including the end-Cretaceous extinction that wiped out the dinosaurs. Key events in southern Africa include some of the earliest fossil evidence of life, mammal-like reptiles and dinosaurs from the Karoo and Drakensberg mountains, and early human ancestors like Australopithecus.
Precambrian geology
The document discusses the Precambrian Eon, which lasted over 4 billion years and comprised approximately 88% of geologic time. During the Precambrian, the Earth had a different atmosphere and hydrosphere than today. The earliest atmosphere was likely hydrogen and helium but was lost to space. Once Earth developed a magnetosphere, volcanism led to an atmosphere forming via outgassing, but it lacked free oxygen and an ozone layer, containing gases like carbon dioxide, ammonia and methane instead.
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The document describes the conditions on early Earth that enabled the origin of life and the key events in the evolution of life over billions of years. It explains that the early atmosphere differed from today's and was conducive to the abiotic synthesis of organic molecules. The earliest evidence of life comes from 3.5-billion-year-old fossils, and life may have originated as early as 3.9 billion years ago. Major events included the emergence of single-celled and then multicellular organisms, and plants and fungi colonizing land around 500 million years ago. Continental drift also played a role in shaping the diversity of life.
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This document provides an overview of evolution on Earth from the earliest life forms to present day. It describes the major eras and events in life's history, including the earliest bacteria and multicellular organisms, the Cambrian explosion of diversification, the rise of plants and animals through the Palaeozoic, Mesozoic, and Cenozoic eras, several mass extinction events, and the radiation and dominance of mammals and modern species. The timeline spans from 4.5 billion years ago to the most recent ice age around 18,000 years ago.
Major extinction events
- An extinction event is a widespread decrease in biodiversity where the rate of extinction increases compared to the rate of evolution of new species. The "Big Five" mass extinction events are the five largest extinction events in Earth's history.
- The document then describes each of the "Big Five" extinction events by time period, percentage of families/genera/species that went extinct, and possible causes. The largest was the Permian-Triassic extinction about 252 million years ago where up to 96% of marine species went extinct.
- Possible causes of mass extinction events discussed are large igneous provinces (flood basalts), sea level falls, asteroid/comet impacts, and global cooling, with flood basalts
Physical Environment and BioGeoChemical Cycles
The document discusses the physical environment and biogeochemical cycles on Earth. It defines the physical environment as natural features like mountains, rivers, forests, and divides it into the atmosphere, land, water, and living things. It then explains that biogeochemical cycles involve chemical substances moving through both biological and physical parts of Earth. Some of the most important cycles mentioned are the water, carbon, nitrogen, oxygen, rock, sulfur, and phosphorus cycles. The document also notes that mercury and human-caused cycles like atrazine are now being more closely studied due to climate change and human impacts.
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The document discusses how geologists use rocks and fossils to understand Earth's history. Rock layers and fossils provide evidence about past life forms and environmental conditions. By analyzing things like rock formations, unconformities, and the fossils contained within rocks, geologists have learned that Earth is much older than previously believed and has undergone geological changes over long periods of time. Radiometric dating techniques also allow geologists to estimate the age of rocks and events in Earth's history.
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The document provides an overview of the geological time scale, which divides Earth's history into eons, eras, periods, and epochs based on fossil evidence. The Paleozoic era saw the evolution of early life, including fish, amphibians, and reptiles. It ended with the largest mass extinction, the Permian-Triassic extinction. The Mesozoic era that followed was dominated by reptiles such as dinosaurs. It included the Triassic, Jurassic, and Cretaceous periods and ended with the Cretaceous-Paleogene extinction.
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The document discusses the history of life on Earth. It states that Earth is very old, and since the first living forms appeared, organisms have changed over time to survive. Today, the world contains many diverse species. The history of life on Earth shows evidence of two types of extinction: background extinction of continuous low levels, and mass extinction where many species die at once. Scientific evidence indicates mass extinction occurred five times over millions of years, where species unable to adapt to environmental changes like climate shifts, meteorite impacts, and volcanic activity went extinct. Each mass extinction was followed by a period of diversification as surviving species filled empty ecological niches.
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www.sciencepowerpoint@gmail.com
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Ch17 evolution of life
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The document summarizes the history of life on Earth from its beginnings around 4 billion years ago to the present. It describes how life first emerged on Earth through natural chemical and physical processes, with the earliest life forms being microspheres composed of amino acids and RNA. These eventually developed into the first prokaryotic cells through self-replication of their RNA. Further evolution led to eukaryotic cells through endosymbiosis, and complex multicellular organisms developed over time, with major diversifications and several mass extinction events altering life on the planet.
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The document summarizes a 2001 paper by Dr. Jeremy Jackson analyzing changes to coastal ecosystems due to overfishing and pollution over recent centuries. It finds collapses in populations of large vertebrates and sessile ecosystem engineers, with communities shifting to bacterially-dominated states. Unless large species are restored through experimental reintroduction, Jackson warns coastal ecosystems may be dominated by microbes within decades, fundamentally altering ocean evolution.
4chapter17
The document outlines the major events in the history of life on Earth, from early single-celled organisms to complex multicellular life. It discusses how fossils provide evidence of early life, how oxygen levels allowed new organisms to emerge, and how sexual reproduction accelerated evolution. It then covers the rise of marine and land animals, the era of dinosaurs and flowering plants, the age of mammals, mass extinctions that opened habitats for new species, and how life has changed from simple to complex forms over time through evolution and coevolution.
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The document summarizes key events in Earth's history from the Precambrian era to the present Cenozoic era. It describes how early Earth's atmosphere evolved, the first appearance of life in the form of stromatolites, the consolidation of continents into Pangaea, the rise of plants and amphibians on land during the Paleozoic, the dominance of dinosaurs and gymnosperms in the Mesozoic, and the replacement of reptiles by mammals as the dominant land animals in the Cenozoic following the Cretaceous-Paleogene extinction event.
Historical Geology Study Guide
Scientists study the Earth's history by examining rocks and dating them. The geological time scale divides Earth's lifetime into eras based on layers of rock and fossils. Relative dating involves placing rocks in proper sequence, while radiometric dating uses radioactive decay to determine ages. The oldest fossils date to around 3.8 billion years ago. Major periods include the Paleozoic, Mesozoic, and Cenozoic eras. Mass extinctions occurred, like at the end of the Permian, possibly due to asteroid impact. Humans have significantly impacted geology through pollution, deforestation, and species extinction.
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The Paleozoic Era started 542 million years ago with the emergence of complex life forms and ended 251 million years ago with the largest mass extinction the world has ever experienced.
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The document summarizes the key spheres that make up Earth's biosphere - the geosphere, hydrosphere, atmosphere, and anthrosphere. It then discusses Biosphere 2, an artificial closed ecosystem experiment in Arizona meant to study interactions within a biosphere. The experiment identified issues like too much CO2 and not enough O2 or food production. It also summarizes the major biogeochemical cycles of water, carbon, nitrogen, and phosphorus that are vital to life on Earth.
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The document discusses the history of life on Earth. It states that Earth is very old, and since the first living forms appeared, organisms have changed over time to survive. Today, the world contains many diverse species. The history of life on Earth shows evidence of two types of extinction: background extinction of continuous low levels, and mass extinction where many species die at once. Scientific evidence indicates mass extinction occurred five times over millions of years, where species unable to adapt to environmental changes like climate shifts, meteorite impacts, and volcanic activity went extinct. Each mass extinction was followed by a period of diversification as surviving species filled empty ecological niches.
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The Cretaceous Period lasted from around 141 to 65 million years ago. It saw the rise of flowering plants and diversification of many modern groups like insects and mammals. The period ended in a mass extinction, possibly caused by an asteroid impact, that wiped out non-avian dinosaurs and many marine reptiles. During the Cretaceous, the supercontinent Pangaea broke apart and climate became cooler with more pronounced seasons. Angiosperms and conifers dominated vegetation, though ferns were also common.
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Sincerely,
Ryan Murphy M.Ed
www.sciencepowerpoint@gmail.com
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How Species Form
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The document summarizes the history of life on Earth from its beginnings around 4 billion years ago to the present. It describes how life first emerged on Earth through natural chemical and physical processes, with the earliest life forms being microspheres composed of amino acids and RNA. These eventually developed into the first prokaryotic cells through self-replication of their RNA. Further evolution led to eukaryotic cells through endosymbiosis, and complex multicellular organisms developed over time, with major diversifications and several mass extinction events altering life on the planet.
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While some regional terms are still in use,[3] the table of geologic time presented in this article conforms to the nomenclature, ages, and color codes set forth by the ICS as this is the standard, reference global geologic time scale – the International Geological Time Scale.[1][
GEOLOGIC-TIME-SCALE.pptx
The document provides an overview of the geologic time scale by describing the major eons, eras, periods, and epochs that have occurred throughout Earth's history from 4.6 billion years ago to present day. It notes key events such as the formation of the early Earth and oceans during the Hadean and Archean eons, the emergence of early life forms in the Precambrian eon, the explosion of animal diversity in the Cambrian period, the rise of reptiles and dinosaurs in the Mesozoic era, and the extinction of dinosaurs paving the way for mammals in the Cenozoic era. The summary covers Earth's geologic and biological progression from its formation to the current era.
Origin of Life eon era periods explained.pptx
The document provides an overview of the geological time scale and describes several key periods in Earth's history. It discusses:
1. The Hadean Eon, when conditions were extremely harsh and the early atmosphere was hostile to life. Despite this, oceans first formed and provided building blocks for life.
2. The Archean Eon, when the first single-celled life forms evolved and primitive ecosystems were established.
3. Significant events in subsequent periods including the evolution of oxygen-producing photosynthesis, multicellular life, plants and animals, dinosaurs, mammals, and modern humans.
4. Climate changes, mass extinctions like the Permian-Triassic event, shifts in dominant
GEOLOGICAL TIME SCALE.pptx
The document summarizes the Geologic Time Scale, which divides Earth's history into eons, eras, periods, and epochs based on major geological events. It describes the four eons - Hadean, Archean, Proterozoic, and Phanerozoic - and provides details about key periods within the Proterozoic and Phanerozoic eons, including major developments in life forms. It also outlines the basic structure and units of the Geologic Time Scale.
Chapter 25
Life originated on Earth between 3.5-4 billion years ago. Early life was dominated by prokaryotes for 2.5 billion years. Oxygen began accumulating in the atmosphere around 2.7 billion years ago. The first eukaryotes appeared around 2.1 billion years ago, and multicellular life evolved by 1.2 billion years ago. Animal diversity exploded during the Cambrian period around 500 million years ago as plants, fungi and animals colonized land.
GEOLOGICAL TIME SCALE.pdf
The document summarizes the Geologic Time Scale, which divides Earth's history into eons, eras, periods, and epochs based on major geological events. The four eons are Hadean, Archean, Proterozoic, and Phanerozoic. Key events included the emergence of life, oxygenation of the atmosphere, formation of the supercontinent Pangaea, the five major extinction events, and the rise of mammals. The current epoch is the Holocene, within the Quaternary period of the Cenozoic era.
Earth Science 3.5 : Time Marches On
The document summarizes key aspects of geologic timescales including:
1) Rock layers at places like the Grand Canyon provide evidence of nearly 2 billion years of Earth's history. Fossils preserved in sedimentary rocks also provide information about geologic eras.
2) Geologists have divided Earth's history into a geologic timescale including eons, eras, periods, and epochs to better study the planet's natural history.
3) Mass extinction events have occurred where a large percentage of species suddenly die off, such as the extinction that ended the Paleozoic era killing nearly 90% of marine species. Climate changes are believed to be a cause of some extinctions.
Presentation1 - Copy3 - Copy - Copy - Copy - Copy - Copy.pptx
Modern humans first appeared in Africa at least 315,000 years ago based on fossil evidence from Morocco. DNA evidence suggests humans may have emerged over 500,000 years ago. Anatomically modern humans spread from East Africa around 70,000 years ago, migrating along coastal regions to Australia, Europe, Asia, and the Americas. The evolution of humans and ancestral species over millions of years in Africa is characterized by increasingly larger and complex brains. Biochemical and genetic evidence from similarities in molecules like insulin and cytochrome c proteins across species supports the theory that all living organisms descended from a common ancestor through shared DNA and metabolic processes.
Origin and evolution of reptiles
The document summarizes the evolution and history of reptiles. It states that reptiles arose from amphibians around 350 million years ago during the Carboniferous period. The earliest reptiles were small insect-eating lizards. Reptiles then diversified and became the dominant land vertebrates by the Permian period. During the Mesozoic era, various reptile groups flourished, especially dinosaurs which appeared in a wide variety of forms. However, most dinosaurs went extinct around 65 million years ago at the end of the Cretaceous period, likely due to an asteroid impact that caused climate change. Despite this mass extinction, modern reptile orders like turtles, lizards, snakes and crocodiles survived
Geologic time scale_1
The geologic time scale is a system used to describe Earth's history by dividing it into units of time based on changes in lifeforms and rock layers. It begins over 4.6 billion years ago with the formation of Earth and extends to the present. Major divisions include eons like the Precambrian and Phanerozoic, eras like the Paleozoic and Cenozoic, and periods like the Jurassic and Quaternary. Life began as single-celled organisms and evolved over billions of years to include complex plants and animals, with major extinction events periodically wiping out many species. The current geologic period is the Quaternary, which began over 2 million years ago and includes the evolution
577
- Evolution is defined as the gradual development of simple matters into more complex forms over time. Darwin was the first to put together evidence to explain evolution through his theory of natural selection.
- Primary claims of evolution include that the Earth is over 4 billion years old, life emerged around 3.8 billion years ago, extinction is a major feature of biological evolution, and humans evolved from pre-existing species.
- Major claims of evolutionary theory include that natural selection is the main mechanism of evolution, whereby individuals with advantageous traits are more likely to survive and reproduce, passing on those traits; all living organisms share a common ancestry; and DNA evidence provides powerful support for the interrelatedness of all life.
Evolving Concept .pptx
The document discusses several theories for the origin of life on Earth:
- Panspermia theory proposes that life originated in space and was transported to Earth via meteors and asteroids.
- Primordial soup theory suggests that organic compounds essential for life were created in the early Earth's atmosphere and oceans.
- Deep sea vent theory posits that life began in the porous crust of Earth near hydrothermal vents, not on the surface.
It then provides a timeline for the major developments of life on Earth from its earliest origins over 4 billion years ago to the emergence of modern humans around 200,000-250,000 years ago. Key events included the first prokaryotes, cyanobacteria that generated oxygen
SCIENCE REPORT (GROUP 1) NEW.pptx
The document discusses the historical development of the concept of life on Earth from its origins over 3.5 billion years ago to the evolution of modern humans. It describes how life began as simple single-celled organisms and gradually became more complex over billions of years, evolving to include the first multicellular organisms, plants, animals, dinosaurs, and eventually modern humans. The document also provides a timeline of key events in the evolution of life and lists fossil and DNA evidence that has been discovered that supports the theory of evolution.
Q3-Lesson-2-History-of-Life-on-Earth.pdf
The document summarizes the geologic time scale which divides Earth's history into eons, eras, periods, and epochs based on fossil evidence. Major developments include the Cambrian explosion of life 540 million years ago, the rise of dinosaurs in the Mesozoic era, and the dominance of mammals including early humans in the Cenozoic era following the extinction of dinosaurs.
Prehistory 1 new
This document provides information about prehistory and the geologic timeline of Earth. It discusses the major eras - Precambrian, Paleozoic, Mesozoic, and Cenozoic - and how life evolved during each era. Key events include the emergence of oxygen-producing cyanobacteria, the five major mass extinctions, the rise and fall of the dinosaurs, and the dominance of mammals in the Cenozoic era. Interactive labs and videos are suggested to help students learn about Earth's 4.5 billion year history in an engaging way.
5938665(1).ppt
The document discusses the origins and evolution of life on Earth. It describes how life first emerged around 3.85 billion years ago, and has since diversified and progressed to more complex forms through natural selection and evolution. The basic requirements for life - sources of energy and nutrients, liquid water - are examined in the context of the potential for life elsewhere in the solar system and beyond. Mars and some Jovian moons like Europa are highlighted as the most promising candidates for extraterrestrial life within our solar system.
Las eras de la geologia (1)
The document discusses the five major geological eras of Earth's history:
1) The Azoic Era occurred from 5 billion years ago and was characterized by geological transformations without any life.
2) The Precambrian Era began 4.56 billion years ago and lasted 1.5 billion years, seeing the emergence of bacteria, algae, and other primitive life forms.
3) The Paleozoic Era from 543-251 million years ago was marked by the proliferation of invertebrate animals and the first vertebrates and plants colonizing land.
4) The Mesozoic Era from 252-66 million years ago was dominated by dinosaurs and saw the rise of mammals and birds before the mass
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The circulatory system transports blood throughout the body using the heart, arteries, veins and capillaries. The main organs of the respiratory system include the nose, pharynx, larynx, trachea, bronchi and lungs which facilitate gas exchange of oxygen and carbon dioxide in the blood. Breathing is controlled by the brain and carbon dioxide levels, while disorders of the circulatory system include high blood pressure, heart attack, and stroke.
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The document summarizes the digestive and excretory systems. It describes the stages of digestion starting in the mouth and continuing through the esophagus, stomach, pancreas, liver, and small and large intestines. It then discusses the key roles and structures of the kidneys in the excretory system, including filtration and reabsorption of waste, and how the kidneys help regulate water content in the blood and maintain homeostasis.
4chapter36
The skeletal system supports the body, protects internal organs, provides movement, and stores minerals. There are three types of joints: immovable, slightly movable, and freely movable. The muscular system contains three types of muscle tissue and muscles contract to allow movement. The integumentary system is made up of skin, which acts as a barrier, protects against injury, regulates temperature, removes waste, and protects against sun radiation.
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Binomial nomenclature provides a two-part naming system for species, with the first word being the genus and the second being the specific epithet. Linnaeus established a seven-level hierarchical system of classification including kingdom, phylum, class, order, family, genus, and species. Cladograms and molecular clocks use DNA comparisons to represent evolutionary relationships and time since divergence between organisms. The three domains of life are Bacteria, Archaea, and Eukarya, with Bacteria and Archaea being prokaryotic and unicellular, and Eukarya containing multicellular eukaryotes including plants, animals, fungi, and most protists.
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The endocrine system is made up of glands that release hormones into the bloodstream. Hormones affect target cells that have receptors for that hormone and can take minutes to days to have their full effect. There are two main types of glands: exocrine glands that release secretions through ducts and endocrine glands that release directly into the bloodstream. The pituitary gland controls the functions of other endocrine glands like the thyroid, which regulates metabolism, and the adrenals, which help the body deal with stress. Feedback mechanisms help regulate hormone levels to maintain homeostasis.
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6chapter37
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5) Link
4chapter13
This document discusses genetic engineering techniques including selective breeding, inbreeding, hybridization, and molecular biology tools to extract, cut, separate and read DNA sequences in order to transform bacteria, plant and animal cells to create transgenic microorganisms, animals and plants as well as using cloning.
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みなさんこんにちはこれ何文字まで入るの？40文字以下不可とか本当に意味わからないけどこれ限界文字数書いてないからマジでやばい文字数いけるんじゃないの？えこ...
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みなさんこんにちはこれ何文字まで入るの？40文字以下不可とか本当に意味わからないけどこれ限界文字数書いてないからマジでやばい文字数いけるんじゃないの？えこ...
みなさんこんにちはこれ何文字まで入るの？40文字以下不可とか本当に意味わからないけどこれ限界文字数書いてないからマジでやばい文字数いけるんじゃないの？えこ...
UiPath Test Automation using UiPath Test Suite series, part 6
UiPath Test Automation using UiPath Test Suite series, part 6
Climate Impact of Software Testing at Nordic Testing Days
Climate Impact of Software Testing at Nordic Testing Days
Essentials of Automations: The Art of Triggers and Actions in FME
Essentials of Automations: The Art of Triggers and Actions in FME
2chapter17
- 1. Chapter 17: The History of Life
- 2. Fossils & Dating Fossils are preserved remains of ancient organisms. The Fossil Record provides paleontologists with a way to discern exactly how old the preserved remains are. Scientists use Radioactive and Relative Dating to determine fossil age. Ziyad Abdelfattah
- 3. Geological Time Scale The geologic time scale represents the eras and periods since Precambrian Time, which was about 650 million years ago. Currently it is the Cenozoic Era (“the age of mammals”), which is represented by a very small portion of the entire geologic time scale. Joseph Ernst
- 4. Formation of the Earth The formation of the Earth occurred over about 100 million years. Elements were arranged according to density and the least dense elements formed the early atmosphere. The early atmosphere was made up of hydrogen cyanide, carbon dioxide, carbon monoxide, nitrogen, hydrogen sulfide, and water. Ziyad Abdelfattah
- 5. Early Life The organic compounds needed for life derived from compounds that were in Earth’s atmosphere billions of years ago. Billions of years ago, photosynthetic bacteria in the ocean were busy producing oxygen. This rise of oxygen made some life forms become extinct and made other life forms evolve. Joseph Ernst
- 7. Patterns of Macroevolution Macroevolution is important evolutionary changes that occur over long periods of time Examples of these macroevolutionary patterns include: mass extinctions, adaptive radiation, convergent evolution, coevolution, punctuated equilibrium, and changes in developmental genes. Joseph Ernst
- 10. THE END