Evolution Review 1

An anatomical feature that no longer seems to have a purpose in the current form of an organism.

The process by which populations of organisms with variations that help them survive in their environments live longer, compete better, and reproduce more than those that do not have the variations.

A situation where two populations of the same species are separated by land barriers like rivers or mountains.

Bacteria with a resistance to the antibiotic passed that trait to their offspring.

Mutation.

The change in the heritable characteristics of biological populations over successive generations.

Mutations introduce new genetic variations, which can lead to new traits in a population.

A trait that increases an organism's fitness in its environment, often resulting from natural selection.

Genetic variation is essential for a population's ability to adapt to changing environments and survive.

Artificial selection is the process by which humans breed organisms for desired traits, while natural selection is the process by which organisms better adapted to their environment tend to survive and reproduce.