Evidence For Evolution

Question 1

What is the first line of evidence for evolution?

Answer 1

Fossil Record

Refer to the Evidence From the Past note.

Question 2

What does comparative anatomy provide evidence for?

Answer 2

Inheritance from a common ancestor

Question 3

What are homologous structures?

Answer 3

Structures that share a common ancestor but may have different functions

Examples include the forelimbs of whales, humans, cats, and bats.

Question 4

What is the significance of the pentadactyl limb?

Answer 4

Having five digits on the end of the limb

Question 5

What are analogous structures?

Answer 5

Structures that are similar in function but not similar in structure or origin

Examples include the wings of a bird and a dragonfly.

Question 6

What are vestigial organs?

Answer 6

Structures in modern animals that have no function but were functional in ancestors

Examples include the pelvis and femur bones in whales.

Question 7

What does embryonic development reveal about related species?

Answer 7

Similar chronological development

Question 8

What primitive structures appear in embryonic stages but are absent in adults?

Answer 8

Gill slits and tails

Question 9

Fill in the blank: Structures that share a common ancestor but may perform different functions are called _______.

Answer 9

homologous structures

Question 10

True or False: Analogous structures arise from common ancestry.

Answer 10

False

Question 11

List two examples of vestigial organs.

Answer 11

• Whale pelvis
• Horse toe