Unit 4 Test Review -2nd SEM ( Evolution/Biodiversity)

During natural selection, the organisms with the best adaptations..

• survive better in their environment
• have higher fitness
• pass down their traits more often
• All of these are correct

What is the definition of evolution?

• populations that change over time

• ability to survive and reproduce

• individuals that change over time

• natural variations in populations

Why does high genetic diversity/variation help populations survive?

• high genetic diversity means a bigger population

• high genetic diversity means a smaller population

• lower chance that some organisms will survive in a changing environment

• higher chance that some organisms will survive in a changing environment

In Darwin's theory of evolution, do individual organisms or populations of organisms evolve?

• Individuals evolve in their own lifetimes

• populations evolve over a period of time

What allows organisms to survive in changing environments over time?

• mutations provide variation, which increases chance of survival

• mutations are always harmful and do not benefit the organism

• all mutations in body cells get passed on

• mutations in gametes are always deadly

The term for the formation of new and distinct species over the course of evolution is...

• speciation
• biological species concept
• reproductive barrier
• natural selection

What is a species? 

• A group of organisms that can mate with each other and produce fertile offspring. 
• A group of organisms that can mate and produce offspring even if those offspring are infertile.
• A group of organisms that genetically are very different from each other. 
• Indivual organisms that live in the same environment. 

_{What type of selection?}

• Directional 
• Stabilizing
• Disruptive

Only populations can evolve.
Individuals can not evolve.

• True
• False

Which of the three graphs shows stabilizing selection?

• A
• B
• C