Explain how fitness can change the allele frequency of a population.

Rachel ate a piece of fruit and happened to drop the seeds in her backyard. after a few weeks, she saw a small plant with flowers growing in the backyard. which group does this plant belong to? a. angiosperms b. gymnosperms c. pteridophytes d. bryophytes e. chytrids

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

Which of the following is a testable hypotheses?