Evolutionary History

Structures that are inherited from a common ancestor are homologous.

• True
• False

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

Bird wings and butterfly wings are an example of

• Homologous structure
• Analogous structure
• Mimicry
• Camoflague

Analogous structures show common ancestry.

• True
• False

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

• Homologous
• Vesitigial
• Analogous

• homologous
• Vestigial
• Analogous

• Homologous
• Vestigial
• Analogous

An anatomical feature that no longer seams to have a purpose in the current form of an organism

• Homologous structure

• Analogous structure

• Vestigial structure

• None of the above

Whales have pelvic bones. What type of structure does this best represent?

• Homologous structure

• Analogous structure

• Vestigial structure

• None of the above