Common Ancestry Review

What is a homologous structure?

• having a body part that has no known function

• similar structures in more than one organism because they evolved from a common ancestor

• a structure that evolved to help an organism survive in their environment

• similar structures that evolved independently in two living organisms to serve the same purpose

Tags

NGSS.MS-LS4-2

Whales live in the ocean. They do not have legs, but they do have a pelvis with small leg bones attached to it. This is evidence that:

• Whales are not well adapted to ocean life.

• Whales do not have homologous structures

• Whales evolved from animals that once lived on land

• Whales evolved from some type of fish

Tags

NGSS.MS-LS4-2

What evidence do similarities between fossil bones and modern organisms provide?

• species that face similar environmental pressure will develop similar traits.

• homologous structures are evidence that the two species are related or shared a common ancestor

• natural selection

• adaptive structures help organisms survive in their habitat

Tags

NGSS.MS-LS4-2

Which animal is most closely related to birds?

• shark

• Primate

• rabbit

• crocodile

Tags

NGSS.MS-LS4-2

When organisms are related...

• They have 100% identical DNA

• They share a common ancestor

• They live in the same environment

• They have the same coloration

Tags

NGSS.MS-LS4-2

What is common ancestry?

• When a species no longer exists

• When organisms are descended from a single ancestor

Tags

NGSS.MS-LS4-2

The diagram shows different vertebrate embryos. Which conclusion is supported by the diagram?

• A. Pigs evolved from reptiles.

• B. Reptiles evolved from birds.

• C. These organisms occupy the same niche.

• D. These organisms share a common ancestor.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

Which of the following describes the idea that all living creatures evolved from one original single-celled organism?

• Evolution

• Natural Selection

• Common Ancestry

• Adaptation

• Survival of the fittest

The diagram shows different vertebrate embryos. Which conclusion is supported by the diagram?

• Pigs evolved from reptiles.

• Reptiles evolved from birds.

• These organisms occupy the same niche.

• These organisms share a common ancestor.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

What conclusions can be made based on this table shown?

• the American black bear and the giant panda share a more recent common ancestor

• the giant panda and the red panda share a more recent common ancestor

• the red panda and the racoon share a more recent common ancestor

• the giant panda and the racoon share a more recent common ancestor

Tags

NGSS.MS-LS4-2