B5.2.2

Question 1

What are fossils

Answer 1

Fossils are formed when animal and plant remains or traces are preserved in rocks.

Question 2

How are fossils evidence for evolution

Answer 2

The fossils found within the different rock layers are different, with the most recent layer are found on the top. The fossil layers form a sequence showing that organisms have gradually changed over time known as the fossil record.

Question 3

What does the fossil record provide

Answer 3

Fossils of the most simplest organisms are found in the oldest rocks and complex organisms in new rocks
Plant fossils appear before animal fossils
Closely related organisms have evolved from the same ancestor. By studying, similarity in anatomy, such as bone structure, scientists can see how modern day species are related to extinct species.

Question 4

What is a negative of the fossil record

Answer 4

There are gaps in the fossil record.

Question 5

Other evidence for evolution (bacteria)

Answer 5

As bacteria can replicate rapidly, scientists can study evolution in action and can observe how an advantageous characteristic becomes common in a bacterial population.

Question 6

What happens to species that don’t adapt to the environment

Answer 6

Species that don’t adapt to the environment die out

Question 7

Other evidence for evolution (protein)

Answer 7

By looking at proteins and DNA of different animals. We can see that closely related species have the most similar DNA and proteins.