Stromatolites: Earth's Ancient Sentinels and Clues to Early Microbial

Chapter 24, Problem 2

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QUESTION:

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 plants moved onto land in the company of fungi around 500 million years ago.

e. contain the first undisputed fossils of eukaryotes and date from 1.8 billion years ago.

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Stromatolites: Earth's Ancient Sentinels and Clues to Early Microbial
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Explore stromatolites, the oldest indicators of life on Earth formed by microbial actions. Understand their presence in shallow marine environments and their connection to early eukaryotic life.

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Questions & Answers

QUESTION:

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 plants moved onto land in the company of fungi around 500 million years ago.

e. contain the first undisputed fossils of eukaryotes and date from 1.8 billion years ago.

ANSWER:

Step 1 of 2

Stromatolites are layered rock formations created by microbial activity, and they serve as some of the most ancient evidence of life on Earth
The oldest stromatolites we've discovered are around 2.8 billion years old, suggesting that life has been present on Earth for a long time.

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