Fossilized Stromatolites

question 66

Multiple Choice

Fossilized stromatolites

• A)more than 2.8 billion years old have not been discovered.
• B)formed around deep-sea vents.
• C)resemble structures formed by bacterial communities that are found today in some shallow marine bays.
• D)provide evidence that photosynthesis was occurring in the oceans by 2.5 billion years ago.

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Definitions:

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