Life 1 billion years ago
[DOC File]AP Biology
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Introduction to the History of Life __1. Describe the major events in Earth's history from its origin up to about 2 billion years ago. In particular, note when Earth first formed, when life first evolved, and what forms of life existed up until about 2 billion years ago. __2. …
[DOC File]Chapter 1 Principles of Life
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Multicellular organisms arose about 1 billion years ago. Cellular _____—cells became specialized to perform certain functions. Evolution of species: _____ are introduced when a genome is replicated. Some mutations give rise to structural and functional changes in organisms, and new _____ arise.
[DOC File]Precambrian and Paleozoic Life
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Fossils indicate that life existed on Earth about 3.5 billion years ago. If the Earth is 4.6 billion years old, life must have begun during Earth’s first 1.1 billion years. Earth probably could not have supported life until about 3.9 billion years ago because meteorites were constantly striking its surface.
[DOCX File]Welcome to...
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4.6 billion years ago, and life on earth emerged about . 3.8 billion years ago. For the first three-quarters of Earth’s history, all of its living organisms were microscopic and primarily unicellular. - …
[DOCX File]The History of Life - MYP YEAR 3 FALCONS - Home
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Scientists have found evidence of photosynthetic life that existed more than 3.5 billion years ago. Endosymbiosis. The fossil record shows that eukaryotic organisms had evolved by 1.5 billion years ago. While the first eukaryotes were made of only one cell, later eukaryotic organisms became multicellular, or made of many cells. ...
[DOC File]UNIT 4 EVOLUTION - Mr. Shanks' Class - Home
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A. THE ORIGIN OF LIFE. 1. The Early Earth a. the earth was formed about _____ billion years ago. b. it was _____, volcanic and bombarded by particles & _____ rays from space. c. it took about _____ million years to settle down. 2. Early Life a. Factors needed for early life
[DOC File]“Cracking the Code of Life” - Human Genome Project
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4 and some billion years ago – 1st speck of life on warm surface of a _____ Raw DNA looks like what in raw form? Eric Lander – geneticist found that it looks like _____ Human beings only have _____ as many genes as the fruit fly. DNA chain in _____ cell of the body ...
[DOC File]Geologic Time
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769 The eon that began about 540 million years ago is called the Phanerozoic, Greek for “visible life”. 770 The sedimentary rocks and deposits of Phanerozoic eon contain an abundance of fossils. 771 The Phanerozoic eon is divided into units called eras. 772 The era names refer to import differences in dominant life-forms. Paleo. zoic
[DOCX File]Classification of Life - Frontier Central School District
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The History of Life on Earth Multicellular eukaryotes (with nuclear membrane) evolved about 1 billion years ago. For 2.6 billion years, life was unicellular. Life began on Earth 3.6 billion years ago as a prokaryotic cell (single-celled organism with no nuclear membrane).
[DOC File]Notes: Chapter 26
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Origin of Life and Classification Date: I. Introduction to the History of Life. A. Life on Earth originated between 3.5 and 4.0 billion years ago. i. The planet Earth formed about . 4.5. billion years ago. ii. The oldest known rocks are . 3.8. billion years old and were found in . Greenland. iii. The oldest fossils found so far are about . 3.5
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