Ordovician Park
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The Ordovician Period saw the rapid evolution and diversification of many new types of invertebrate animals, including trilobites, brachiopods, and bryozoans. Primitive plants began to colonize land for the first time, while fungi formed mutualistic relationships with plant roots. The period ended in a major extinction event.
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This document provides information about macroinvertebrates, fossils, and riparian vegetation found in the Rocky Mountain Biological Laboratory. It discusses the life cycles of macroinvertebrates like stoneflies, mosquitoes, mayflies, and caddisflies which are important indicators of stream quality. The document also describes finding fossils from the Permian period like brachiopods and trilobites. Finally, it outlines the importance of riparian vegetation for stabilizing streambanks, providing food and shelter for aquatic life, and maintaining water temperature.
geologic time table in biology
The document provides brief descriptions of various prehistoric lifeforms. It describes mammoths as large, hairy elephants with curved tusks. Mastodons are described as an extinct relative of elephants that inhabited North America until 11,000 years ago. Saber-toothed cats are defined as predatory mammals characterized by long, curved canine teeth. Ground sloths are introduced as a diverse group of extinct sloths that were larger than modern tree sloths.
Mollusca of India and need for conservation
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda. The members are known as molluscs or mollusks. Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species
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.
cenozoic era- eVERYTHING ABOUT THE TIME OF MAMMALS
The Cenozoic Era began 65 million years ago after the KT extinction event wiped out the dinosaurs. It is divided into periods and epochs, and is known as the "Age of Mammals" as mammals diversified and grew to fill ecological niches previously occupied by dinosaurs. During the Cenozoic, flowering plants flourished, grasses evolved, and climate changes drove evolution and extinction events, with mammals like whales, elephants and horses emerging. Birds also thrived while reptiles like crocodiles persisted from earlier eras. The Holocene epoch marks the rise of human civilization and a new extinction event caused by human impacts.
cenozo amnssamkldicera-161118142630.pptx
The Cenozoic Era began 65 million years ago after the KT extinction event wiped out the dinosaurs. During this era, mammals diversified and grew in size and dominance as the climate changed. Birds, flowering plants, and insects also thrived. In the Paleogene period, mammals and birds were small but began evolving into modern groups. The Neogene saw the rise of grasslands and large mammals like horses and rhinos. The Pleistocene ice ages drove many large mammals like mammoths and saber-toothed cats to extinction. In the current Holocene epoch, human activity has caused a new mass extinction event.
Origin of Men
The document summarizes the evolution of men from early sea creatures through different periods. In the Triassic period, therapsids and early dinosaurs evolved. The Jurassic period saw the rise of large sauropods and theropods. During the Cretaceous, dinosaurs diversified with raptors, tyrannosaurs, and feathered dinosaurs. Eventually, simple apes evolved into humans, as proposed by Charles Darwin's theory of evolution. One of the oldest known human bones is Lucy, an Australopithecus afarensis fossil from 3.2 million years ago.
Chapter 12
The document discusses the characteristics of the mollusca phylum. It notes that molluscs have soft bodies and come in a wide variety of forms, including snails, clams, and octopuses. The phylum is very successful, with over 100,000 species, and molluscs have adapted to live in many different environments through evolution. The three main classes of molluscs - gastropods, bivalves, and cephalopods - are also introduced.
Cenozoic era
The Cenozoic Era began 65 million years ago after the extinction of the dinosaurs. During this era, mammals diversified and grew larger to fill ecological niches as the dominant land animals. Birds also flourished. The era is divided into periods and epochs where species evolved or went extinct based on environmental changes. During the Paleogene period after dinosaurs, mammals and birds were small but evolved into ancestors of modern groups. In the Neogene, grasslands expanded and large mammals like horses and rhinos evolved. The Pleistocene ice ages drove many large mammals like mammoths and saber-toothed cats to extinction. The current Holocene epoch since the last ice age has seen human impacts drive further extinctions.
Narrative Report on Geologic time scale
1. The document outlines the major periods in the geologic history of Earth from the Precambrian Eon to the present Cenozoic Era. It describes the major life forms, events, and changes that occurred during each period.
2. The periods are organized into larger divisions of geologic time including eons, eras, and periods. The Precambrian saw the earliest life forms evolve. The Paleozoic saw the Cambrian explosion of life and the rise of fish and land plants.
3. Mass extinctions occurred between periods, including the end-Permian mass extinction which wiped out 95% of marine species. The Mesozoic saw the rise of dinosaurs and mammals. It
Molluscan
Cephalopods such as octopuses, squid, and cuttlefish evolved large brains, complex senses, and rapid locomotion for predation, but their numbers have declined dramatically. Vertebrates may have outcompeted cephalopods by developing active predatory lifestyles. Mollusks are a large phylum that includes snails, slugs, mussels and octopuses. They have soft bodies that are sometimes covered by an external shell secreted by the mantle. Mollusks display bilateral symmetry and their body plans generally include a head-foot region and visceral mass.
6 - Dispersal and Migration.ppt
This document discusses the processes of dispersal and immigration in biogeography. It describes the historical debate between "dispersalists" who believed disjunctions were caused by long distance dispersal versus "extensionists" who believed they were caused by now disappeared corridors. While no evidence was found for the extensionists' view, evidence for continental drift supported long distance dispersal. The document then examines different types of dispersal mechanisms like jump dispersal, diffusion, and secular migration that allow species to expand their ranges. It also discusses barriers to dispersal posed by oceans, mountains, temperature and other environmental conditions.
209 20 13_1
The document summarizes information about early life on Earth, including the earliest life forms such as stromatolites and cyanobacteria. It discusses evidence from formations like the Apex Chert in Australia that contain microfossils of early prokaryotes. Later, eukaryotes emerged, as evidenced by fossils from 770 million years ago. The Ediacara Hills of Australia preserve imprints of some of the earliest complex multicellular organisms from approximately 630-550 million years ago.
Dinosaurs
Dinosaurs dominated land for over 160 million years. Birds evolved from small feathered theropod dinosaurs and are now considered a type of dinosaur. While sauropods like Brachiosaurus were the largest at over 30 meters long, small feathered dinosaurs like Microraptor were only around a chicken's size. Dinosaurs displayed a diversity of body shapes, sizes, diets and behaviors during their long reign.
Evolutionary history of insects
this presentation will help you to learn about the evolutionary history of development of insects and their adaptations as the passage of the time.
A view of the earth’s past
This document provides an overview of geologic history from the Precambrian era to present day. It describes the major eras, periods, events, climate changes, organisms, and theories of evolution that are recorded in the layers of rock and fossil records. The document is organized chronologically, with each era and period summarized in terms of dominant life forms, environmental conditions, and significant developments or extinctions. Major theories like plate tectonics and mass extinction events are also outlined.
3_Marine biology & ecology_MARINE FLORA FAUNA CLASSIFICATION.pdf
This document provides a classification of aquatic flora and fauna. It begins by explaining the phylogenetic tree used to classify organisms and their evolutionary relationships. It then lists and describes major kingdoms of aquatic life, including plants (algae and seagrasses), invertebrates (sponges, cnidarians, ctenophores, flatworms, annelids, molluscs, bryozoans, arthropods, echinoderms, tunicates), and vertebrates (reptiles, cartilaginous fish, bony fish, marine mammals, tetrapods). Over 40,000 species of algae, corals, jellyfish, shellfish, fish and marine
Habit & Habitat of Trilobites The Index fossil of Cambrian geological age.pptx
Rufaida Hassan Nafia gave a presentation on Habit & Habitat of Trilobites which is Index Fossil of Cambrian geological time. This lecture is part of Earth Science, Paleontology.
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Triassic
Aquí tenemos un trabajo sobre el triásico, donde encontraremos bastante información sobre este (en inglés).
Donde pone by, podeis poner vuestros nombres. ;-)
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cenozoic era- eVERYTHING ABOUT THE TIME OF MAMMALS
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3_Marine biology & ecology_MARINE FLORA FAUNA CLASSIFICATION.pdf
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Habit & Habitat of Trilobites The Index fossil of Cambrian geological age.pptx
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Ordovician Park
- 3. Primitive vascular plants appeared the land, until then almost totally barren.
- 4. The supercontinent of Gondwana drifted over the south pole, initiating a great Ice Age that gripped the earth at this time. The end of the period is marked by a major extinction event.
- 10. The trilobites were among the most successful of all early animals, roaming the oceans for over 270 million years.