6.2 Variation and evolution

Easy

Scientists think that the cetacean species shown below all evolved from a common ancestor that lived about 50 million years ago.

The diagram shows how these species may have evolved:

An evolutionary tree showing the relationships between six cetacean species.

Use the diagram to answer the following questions:

What was the most recent time that the Bottlenose dolphin and the Dall's porpoise shared a common ancestor?

[1]

Which present-day cetacean in the diagram is the most distant relative of the Dall's porpoise?

[1]

6.2 Variation and evolution Questions