8.L.4.1 Evolution of lifeforms study guide

Front

What type of isolation occurs when species are separated by physical barriers like rivers or mountains?

Back

Geographical (Allopatric) isolation occurs when species are separated by physical barriers.

Front

Which bird’s beak is best adapted to get nourishment from the nectar of flowers?

Back

Hummingbird beaks are best adapted for extracting nectar from flowers.

Front

Why did the Galapagos finches evolve with differently shaped beaks?

Back

They adapted to eating different types of food.

Front

What is the greatest threat to an arctic hare that cannot change its coat color in winter?

Back

Predators pose the greatest threat to the hare due to its inability to camouflage.

Front

What are structures that share a common ancestry but may have different functions called?

Back

Homologous structures.

Front

What is the term for species that evolve separately but develop similar traits due to similar environments?

Back

Analogous structures.

Front

What is genetic variation?

Back

Genetic variation refers to the differences in DNA among individuals within a species.

Front

What is natural selection?

Back

Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.

Front

What is the significance of vestigial structures?

Back

Vestigial structures are remnants of organs or structures that had a function in an early ancestor but are no longer useful.

Front

What is the role of mutations in evolution?

Back

Mutations introduce new genetic variations, which can lead to evolutionary changes.