Unit Test — Unit test

Question 1

Which best describes the fossil record?

Revolt · Accepted Answer

The fossil record provides evidence of a common ancestor to many species.

Question 2

In a cladogram, when does a group of organisms branch off?

Revolt · Accepted Answer

when a new trait evolves

Question 3

Scientists notice structural similarities between fossils of a land animal and an aquatic organism. They know the similarities are not a result of the two organisms having to adapt to similar environments. What can they attribute the structural similarities to?

Revolt · Accepted Answer

common ancestry

Question 4

Horses and zebras can be bred to produce a zorse, which is infertile. Which is most likely the reason zebras and horses are considered separate species?

Revolt · Accepted Answer

Their offspring cannot breed.

Question 5

Why was modern classification invented?

Revolt · Accepted Answer

Scientists understood that species share a common ancestor.

Unit Test — Unit test Answers

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