MP3 Natural Selection

an inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment.

• adaptation

• natural selection

• niche

• competition

the struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time.

• adaptation

• natural selection

• niche

• competition

What is a common ancestor?

• An animal that has a lot of offspring.

• An animal from which two or more different species evolved.

• An animal that is related to many other species.

• An animal that's good at escaping from predators.

Which of the following is an example of an environmental pressure?

• The air pressure in the atmosphere

• Breeding between two members of the same species

• Melting sea ice due to global warming.

• A fight between two members of the same species

In the phrase "survival of the fittest," the term "fittest" refers to:

• The best-adapted organisms

• The biggest organisms

• The smartest organisms

• The fastest organisms

When nature "selects" a variation, that means that the trait:

• Gets passed along from generation to generation

• Causes the population to shrink

• Has brought about a new species

• Helps prey escape predators

Where the better adapted organisms survive to pass traits along to offspring.

• Evolution
• Natural Selection
• Extinction
• Artifical Selection

Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.
• Because they come from dominant alleles.
• Because they come from recessive alleles.
• Because the trait is an acquired phenotype.

Mutations are a change in what?

• DNA

• tRNA

• protein

• rRNA

The differences among a species, like different bird beaks, are called

• genes.
• variations.
• traits.
• theories.