Transcript of " B31 ppt the history of life ch 14"
VariablesImportant Factors in Choosing Papaya (to be narrowed down to 10) Demographics place where growing origin of plant- commercial, nursery, friend, volunteer, etc) height of plant garden or wild intention of plant (to eat, ornamental, use of plant – eating, giving away, selling?, Condition of the plant (diseased (describe) used fertilizer, use pesticide, Growing alone or in cluster does the plant have fruit? For HW Credit - List other variables can think of 20 – 4 pts 15 - 3 pts 10 – 2 pts 5 – 1 pt
Biology 4th Quarter DIVERSITY, CLASSIFICATION, GENETICS, AND EVOLUTION Understand genetics and biological evolution and their impact on organisms – Why don’t some antibiotics work anymore? The Big Idea(s) / Major Understanding(s): • Evolution and natural selection lead to organisms changing over time. • Modern classification system groups organisms according to their degree of relatedness. Week 31 History of Life Week 32 Theory of Evolution Week 33 Mechanisms of Evolution Week 34 Primate Evolution Week 36 Classification of Living Things Week 37 The Six Kingdoms Weeks 38 and 39 Final Projects
Week 31 only 8 to go The History of Life Water Humans Geologic Time Scalecools on appear!!surfaceof Earth4.5 bya First living things appear Ch 14 Pg 368 3.5 bya See video – Carl Sagan Cosmos
when life originated 3.9 to 3.5 billion years ago (bya) First living things appear 3.5 bya
fossil Evidence of an organism that lived long ago that is preserved in earth’s rock
paleontologist Scientist that studies ancient life, like a detective
Fossil formation Organisms die and are buried in mud leaving an impression
Relative dating Determining the age of fossils by comparing fossil in the layers of rock around it
radiometric isotope dating Determining the Atoms of the same age of fossils by element that have measuring the different numbers amount of of neutrons radioactive isotopes
geologic time scale A chronology of the earth’s history based on rocks and fossils
Precambrian era 87% of earth’s history, from prokaryotes Precambrian Era to beginning invertebrates (hard shelled animals, up to 543 million years ago (mya)
Paleozoic era old life 13% Era where the of the time amount of life oxygen has been increased in the on atmosphere earth before abundant complex life, up to 248 million years ago (mya) Without oxygen, you would be pale! 87%
Mesozoic era Often called the “age of reptiles” with much tectonic, climatic and evolutionary activity, ended with mass extinction 65 mya Don’t mess with dinosaurs!
plate tectonics 2 6 Theory of how 1 5 continents move – 8 4 spreading apart, 3 9 sliding by or 7 pushing against each other Like plates on a table pushing and sliding against each other Video Unfold the earth Seismic Earthquakes - earthquakes Plate tectonics - animation
Cenozoic era Our current era, when mammals began to flourish
spontaneous generation biogenesis The idea that nonliving The idea that living material can produce organisms come only life, disproved by from other living Francisco Redi and Louis Pasteur organisms
protocell A large ordered structure, enclosed by a membrane that carries out some life activities such as growth and division, show how the first cells may have occurred link
archaebacteria beginning, origin Prokaryotes that are thought to be the first living organism, followed by photosynthesizing prokaryotes
endosymbiont theory Internal relationshipExplains how eukaryotes probably evolved from prokaryotic cells What does this illustration suggest about the evolution of cells?
Homework– Analyze and critique the four ideas about the origin of life on pg 388Or– Make a poster of the Geologic Time Scale showing the history of life on Earth – show eras, periods, epochs and mya4 pts. – color with drawings and descriptions, very neat3 pts – color with drawings and descriptions, neat2 pts - descriptions, neat