Evolution / Structures

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

Structures that are inherited from a common ancestor are homologous.

• 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

Bird wings and butterfly wings are an example of

• Homologous structure
• Analogous structure
• Camaflouge
• Mimicry

The structures shown are_________

• homologous
• heterologous
• analogous
• vestigial

According to this cladogram, sharks are MOST closely related to which organism? 

• Amphibians
• Ray finned fish
• Crocodiles
• Birds

According to the cladogram, which organism is most distantly related to the human?

• crayfish
• grasshopper
• perch
• frog

You look at two species and see very similar DNA. What does this likely tell you?

• These are the same animal.
• These animals have a common ancestor.
• These animals are not likely related.
• These animals are likely becoming one species.

An inherited characteristic that increases an organisms ability to survive and reproduce in its specific environment is called a(n)

• vestigial structure
• speciation
• analogous structure
• adaptation

When did the Earth and Moon form?

• 3.5 billion years ago
• 4.6 billion years ago
• 543 million years ago