Evolution Review

What is it called when some organisms live long enough to survive and pass on their genetic traits?

• Reproductive isolation

• Geographic isolation

• Descent with modification

• Natural selection

The "fittest" individuals (according to Natural Selection) tend to have:

• Traits their parents acquired by use and disuse
• Sterile offspring
• Asexual reproduction
• Traits best adapted for their specific environment

In humans, the appendix has almost no function. This is an example of a:

• Homologous structure
• Vestigial structure
• Analogous structure
• Fossil

According to this image, which animal is most closely related to a crocodile?

• Shark

• Rodent

• Bird

• Amphibian

How does sexual reproduction help with evolution?

• Sexual reproduction increases genetic variety
• Sexual selection decreases genetic variety
• Sexual reproduction happens more rapidly than asexual reproduction
• In sexual reproduction, offspring are the same as their parents

The geographic isolation (physical barrier) of these two types of fish is likely to lead to:

• Artificial Selection
• Extinction
• Gene flow
• Speciation

How is a theory different than a hypothesis?

• Theories are educated guesses
• Theories are absolute and never change
• Theories are facts
• Theories are the best attempt to explain data

Random overhunting of cheetahs has lowered the population by 90%. As a result, this population has little genetic variation. What mechanism of evolution best explains what has happened?

• Genetic drift (bottlenecking)

• Gene flow

• Natural selection

• Artificial selection

How could you tell which species is most closely related to Species 1 in this image?

• Look for the species with the most amino acid differences from Species 1
• Look for the species with the least amino acid differences from Species 1

What do these homologous structures suggest?

• All of the structures have the same function
• All of these structures are vestigial
• All of the same structures suggest a common ancestor
• All of the same structures suggest no common ancestor