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[DOC File]Chapter 25
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The 565-million-year-old Ediacaran fossils suggest that a set of genes sufficient to produce complex animals existed at least 30 million years before the Cambrian explosion. The Cambrian explosion may have been due in part to new genes (created by gene duplication events) taking on a wide range of new functions in a variety of animal lineages.
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[DOCX File]A. Hammond Biology - Home
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(b) The graph shows how the rate of extinction of groups of animals has varied over the past 300 million years. (i) If more than 10 groups of animals become extinct in a …
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[DOCX File]National Curriculum: - Teaching Evolution in …
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MOST: Different animals existed at different times in Earth’s history. SOME: Life we see today has evolved from life millions of years ago and the conditions of Earth have changed over time such as atmospheric content and temperature. Differentiated outcomes: ALL: Will be able to explain that the Earth is billions of years old.
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[DOCX File]The animals
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Squirrels are generally small animals, ranging in size from the African pygmy squirrel, at 7–10 cm (2.8–3.9 in) in length, and just 10 g (0.35 oz) in weight, to the Alpine marmot, which is 53–73 cm (21–29 in) long, and weighs from 5 to 8 kg (11 to 18 lb). Squirrels typically have …
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[DOCX File]Fossils
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Rocks in Nashville have many fossils of brachiopods (clam-like animals), crinoids, and corals that are 400 million years old. 400 million years ago, when these fossils were …
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[DOC File]VANDERBILT STUDENT VOLUNTEERS FOR SCIENCE
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Q. Ask students if they’ve thought about how long humans have existed in the geologic time scale. Humans have only existed in the very last knot of the rope (the dangling skeleton). This is an extremely short time in the history of the earth. Lesson written by: Pat Tellinghuisen, Program Coordinator of VSVS1998-2018, Vanderbilt University
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How long have animals existed