Homologous Analogous and Vestigial Structures

What is the definition of homologous structures?

• Similar structures found in different species that share a common ancestor.

• Structures that are not related to each other or to a common ancestor.

• Structures that are only found in humans.

• Structures that have evolved independently in different species.

Tags

NGSS.HS-LS4-1

An anatomical feature that no longer seems to have a purpose in the current organism

• Homologous structures

• Analogous structures

• Vestigial structures

• None of the above

Tags

NGSS.MS-LS4-2

What is the definition of analogous structures?

• Structures that have similar functions but different evolutionary origins.

• Structures that have different functions but similar evolutionary origins.

• Structures that have similar functions and similar evolutionary origins.

• Structures that have similar functions but different functions.

Provide an example of analogous structures.

• Bat wings and fish fins.

• Bird wings and butterfly wings

• Human arms and dog legs.

• Spider legs and crab legs.

What is the main difference between homologous and analogous structures?

• The main difference between homologous and analogous structures is their size and shape.

• The main difference between homologous and analogous structures is their function and purpose.

• The main difference between homologous and analogous structures is their location and distribution.

• The main difference between homologous and analogous structures is their structure and origin.

Are homologous structures derived from a common ancestor?

• Yes

• Sometimes.

• They are not related.

• No.

Tags

NGSS.HS-LS4-1

Do analogous structures have a common evolutionary origin?

• Not always.

• Sometimes.

• No

• Yes.

Tags

NGSS.HS-LS4-1

Which type of structures indicate a closer evolutionary relationship: homologous or analogous?

• analogous

• unrelated

• convergent

• homologous

Tags

NGSS.HS-LS4-1

Can homologous structures have different functions?

• Yes

• Rarely.

• Sometimes.

• No.

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-5

Can analogous structures have similar functions?

• No.

• Sometimes.

• Not always.

• Yes

Tags

NGSS.MS-LS4-2