Analogous and Homologous

If two organisms share a common ancestor they are known to be

• Homologous

• Analogous

Tags

NGSS.MS-LS4-2

Do these homologous structures share a common ancestor?

• yes

• no

Tags

NGSS.MS-LS4-2

What is this an example of?

• Homologous structure

• Analogous structure

• Vestigial organs

• Functional adaption

Tags

NGSS.MS-LS4-2

Structures with the same parts have different functions; suggests that organisms share a common ancestry

• vestigial structures

• homologous structures

• adaptive radiation

• fossil

Tags

NGSS.MS-LS4-2

How can one distinguish between homologous and analogous structures?

• By examining the complexity of the structures

• By comparing their functions

• By analyzing their evolutionary history

• By the location of the structures in the body

Tags

NGSS.MS-LS4-2

Which of the following is an example of analogous structures?

• The wings of a butterfly and the wings of a bird

• The flippers of a penguin and the arms of a human

• The tail of a monkey and the tail of a cat

• The legs of a dog and the legs of a cat

Tags

NGSS.MS-LS4-2

Which of the following best describes the function of analogous structures?

• They perform different functions but have a similar structure.

• They perform the same function but do not have a common ancestry.

• They perform the same function and have a common ancestry.

• They have no significant function and are vestigial.

Tags

NGSS.MS-LS4-2

What is a key characteristic of analogous structures?

• They are found in species that live in different habitats.

• They are found in species that live in similar habitats and face similar environmental challenges.

• They are inherited from a common ancestor.

• They are less efficient than homologous structures.

Tags

NGSS.MS-LS4-2

Why do analogous structures not indicate a close evolutionary relationship?

• Because they arise from different genetic backgrounds

• Because they are a result of artificial selection

• Because they are vestigial and not functional

• Because they are always structurally different

Tags

NGSS.MS-LS4-2

Which of the following best describes homologous structures?

• They have a similar structure and perform the same function.

• They have a similar structure but perform different functions.

• They have different structures and perform the same function.

• They have different structures and perform different functions.

Tags

NGSS.MS-LS4-2