14
QuizMultiple Choice

Biological Evidence and the Fossil Record — Test

Question 14 • TPS EdX Biology

Which best explains a primary reason for the inability of life to exist in Earth’s early atmosphere?

Answer
A
Available oxygen was used to help create an ozone layer within Earth’s atmosphere.
B
There was insufficient energy from material collisions to change their density.
C
Volcanic eruptions and comet collisions added different gases to the atmosphere.
D
High temperatures during Precambrian time caused surface water evaporation.

Explanation

Early Earth was extremely hot, so liquid water could not remain on the surface and instead evaporated. Since life as we know it depends on liquid water, those conditions made life unable to exist. Choice D, high temperatures during Precambrian time causing surface water evaporation, best explains this limitation.

AI-written and checked against the verified answer.

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