Evidences of Common Ancestry

Question 1

It tells us that life is old and has changed over time.

Answer 1

Fossils

Question 2

TRUE OR FALSE?

Fossils that are deeper down are older and existed before than fossils that are closer to the surface.

Answer 2

TRUE. This happens because of the way rock layers formed.

Question 3

Structures that are similar in different species because they were inherited from a common ancestor.

Answer 3

Homologous Structures

Question 4

Structures that have similar functions (jobs) but were NOT inherited from a common ancestor.

Answer 4

Analogous Structures

Question 5

Structures that were important in an ancestor, but are useless in the modern species.

Answer 5

Vestigial Structures

Question 6

This is how an organism develops from a zygote to an adult.

Answer 6

Developmental Biology

Question 7

TRUE OR FALSE?

Distantly related organisms go through similar developmental stages (zygote to an adult). This implies that they shared a common ancestor.

Answer 7

TRUE