Natural Selection and Evolution Practice Problems

Darwin suggested that populations of organisms become better adapted to the environment through:

According to the idea of natural selection, organisms with the best environmental adaptations have _______.

Evolving long necks have enabled giraffes to feed on leaves that others can't reach, giving them a competitive advantage. It is the best example of:

Which of the following, in your opinion, is responsible for gradually increasing the genes that confer HIV resistance in human populations in high-HIV-infection areas over time?

According to the natural selection theory, who is more likely to survive and reproduce?

What could have caused the beak size and shape variations among finches as observed by Darwin on Galapagos Islands?

A characteristic is heritable if it is _____ from parents to offspring.

Which of the following statements best describes evolutionary theory?