Question

What do these layers and their fossils suggest about Earth's history?

A.
Only one kind of lifeform lived where these layers formed.
B.
No lifeforms were present when these layers formed.
C.
Lifeforms on Earth have been the same over time.
D.
There have been changes in Earth's lifeforms over time.

Answer 1

The answer is D

Step-by-step explanation:

Answer 2

D

Step-by-step explanation:

There have been changes in Earth's lifeforms over time.