Scientists estimate that for more than _______ years after cells originated, all organisms
consisted of one cell.
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2 billion years
scientific explanations for a natural phenomenon
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are based on quantifiable and reprodcuible observations
Increasing complexicty
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Molecule, cell, tissue, organ, organ system, organism
2 carbon atoms held together in a double covalent bond share electrons
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c) 4
A journal article where a scientist gives a full description of the research
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primary source
Atomic Mass
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Sum of protons and neutrons
Which of the following is not true?
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consisted of one cell.
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2 billion years
scientific explanations for a natural phenomenon
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are based on quantifiable and reprodcuible observations
Increasing complexicty
, Give this one a try later!
Molecule, cell, tissue, organ, organ system, organism
2 carbon atoms held together in a double covalent bond share electrons
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c) 4
A journal article where a scientist gives a full description of the research
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primary source
Atomic Mass
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Sum of protons and neutrons
Which of the following is not true?
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