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The first forms of life on earth were ________.

a. plants
b. microorganisms
c. birds
d. dinosaurs 5. a suggested and testable explanation for an event is called a ________.
a. hypothesis
b. variab

User Ramayac
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1 Answer

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The first form of life were b. microorganisms :)

For question 5, the answer should be a. Hypothesis
User Oink
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