Homologous and Vestigial Structures Review

What conclusion can be made from this picture?

• Whales and their ancestors have always been ocean dwellers.

• Ancestors of whales had fewer bones than modern whales.

• Whales and their ancestors have always been ocean dwellers.

• Ancestors of whales may once have been able to walk.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Which of the following is an example of a vestigial structure?

• the wings of a red-tailed hawk

• the hind limbs of a house cat

• the fins of sharks

• the tailbone of a human

Tags

NGSS.MS-LS4-2

What type of evidence is represented in the picture above:

• Fossils

• Vestigial Structures

• DNA

• Homologous Structures

Tags

NGSS.MS-LS4-2

The similarities of the bones in the diagram provide evidence that---

• The organisms shown lived in the same natural envionrment

• The organisms shown may have developed from a common ancestor

• The organisms shown have the same genetic diseases

• All vertebrate species have identical forelimbs

Tags

NGSS.MS-LS4-2

If an organism has a vestigial structure, that structure likely once had a function in a(n)

• close relative

• early ancestor

• unrelated organism

• embryological stage

Tags

NGSS.MS-LS4-2

Body parts similar in structure and origin

• evolution

• embryology

• homologous

• variation

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

Whales are aquatic mammals that contain a pelvis bone.  Even though it does not aid in its movement, the function must have been used by a common ancestor of the whale.  Thus, the pelvis is referred to as a(n)

• vestigial structure

• analogous structure

• homologous structure

Tags

NGSS.MS-LS4-2

Which of the following is an example of a vestigial structure in humans?

• Appendix

• Heart

• Liver

• Lungs

Tags

NGSS.MS-LS4-2

What is the primary difference between homologous and vestigial structures?

• Homologous structures have different functions but similar origins, while vestigial structures have lost their original function.

• Homologous structures have the same function and origin, while vestigial structures have different functions.

• Homologous structures are found in different species, while vestigial structures are found in the same species.

• Homologous structures are functional, while vestigial structures are non-functional.

Tags

NGSS.MS-LS4-2

Which of the following pairs are considered homologous structures?

• Human arm and whale flipper

• Bird wing and insect wing

• Fish fin and octopus tentacle

• Dog tail and cat whiskers

Tags

NGSS.MS-LS4-2