Homologous Structures

Structures that are inherited from a common ancestor are homologous.

• True
• False

Tags

NGSS.HS-LS4-1

Humans, birds, whales, and lizards all have similar arm bones. What is the reason for this?

• The function of these bones is the same in all animals
• They live in similar environments
• They have a common ancestor
• All organisms resemble humans

Tags

NGSS.HS-LS4-1

A scientific theory is proven and based on evidence.

• True
• False

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-4

What is suggested by the similarity of early embryos of different species of vertebrates?

• no evolutionary relationships between the groups
• recent common ancestry
• similar environments in the past
• evolution from a distant common ancestor

Tags

NGSS.HS-LS4-1

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.HS-LS4-1

NGSS.HS-LS4-4

Some organisms that share a common ancestor have features that have different functions, but similar structures.  These are known as

• vestigial structures
• analogous structures
• homologous structures
• fossil structures

Tags

NGSS.HS-LS4-1

The structures shown are_________

• homologous
• heterologous
• analogous
• vestigial

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-2

Structures that are inherited from a common ancestor are homologous.

• True
• False

Tags

NGSS.HS-LS4-1

Structures that are inherited from a common ancestor are homologous.

• True
• False

Tags

NGSS.HS-LS4-1