Natural Selection and Evolution Summative

One of the requirements for natural selection to occur in a population is

• all animals are the same

• acquired traits

• common ancestors

• variation

The ability to survive and reproduce is called

• evolution

• adaption

• trait

• fitness

What happens to organisms when there is a big change in their environment, like a forest fire?

• organisms become extinct

• organisms die

• organisms with the best adaptations survive

• nothing, they just go on with life

Natural selection is

• a process where organisms better suited for their environment survive and reproduce

• an inherited characteristic that benefits organisms

• a process of change over time to a species

• surviving and reproducing in an environment

A natural variation that benefits an organisms is called a(n)

• fitness

• evolution

• adaptation

• acquired trait

In order for natural selection to occur in a population, ______ is required.

• uniformity

• time

• standardization

• conformity

When a dairy farmer chooses to breed the cows that give the most milk, the farmers are demonstrating

• artificial selection

• natural selection

• evolution

• fitness

Why is competition important for natural selection?

• It shows which variations are more successful, allowing the organisms with those variations to survive.

• It causes organisms, regardless of which traits they have, to die out, reducing the population size.

• It causes organisms to get stronger due to having to outcompete other species.

• Competition is not important for natural selection.

If an organism can't adapt fast enough, this might happen.

• hibernate
• stay the same
• live longer
• become extinct

individuals with alleles for an extreme type are more likely to survive and reproduce

• stabilizing selection

• directional selection

• disruptive selection

• genetic drift