Evolution Review 1

Front

What is a vestigial structure?

Back

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

Front

What is natural selection?

Back

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.

Front

What is geographical isolation?

Back

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

Front

Why has antibiotic resistance evolved in bacteria?

Back

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

Front

What is the cause of all variation within a population?

Back

Mutation.

Front

Define evolution.

Back

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

Front

What is the role of mutations in evolution?

Back

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

Front

Explain the concept of adaptation.

Back

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

Front

What is the significance of genetic variation in a population?

Back

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

Front

What is the difference between artificial selection and natural selection?

Back

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.