2025 Biology Unit 9 FMQ Pt1

According to Darwin's theory on natural selection, which of the following is true about traits that survive to future generations?

• They are all a result of new mutations.

• They are already present in the population.

• They are only introduced by immigrating species.

• They are all a result of a change in the environment.

Adaptive radiation can be characterized by –

• multiple species being formed from a single common ancestor

• two different species evolving over time in response to environmental changes

• the extinction of several species at the same time

• the process by which a single species evolves certain adaptations to survive in their environment

Which of the following describes the mechanism that led to the current male peacock tail size?

• non-random mating

• natural selection

• mutation

• genetic drift

Extinction of a species most often occurs because of ______.

• competition

• habitat change

• predation

• pathogens

Speciation, a process in which a new biological species arises, occurs in stages and results in a species with an improved “fit” for its environment. Speciation can result when two populations have become –

• A. extinct

• B. reproductively isolated

• C. interbred

• D. one population