AP BIOLOGY

Detailed explanation-1: -Fitness is a measure of how well organisms survive and reproduce, with emphasis on “reproduce.” Officially, fitness is defined as the number of offspring that organisms with a particular genotype or phenotype leave behind, on average, as compared to others in the population.

Detailed explanation-2: -The best measure of an organisms fitness would be the number of fertile offspring is produces. Fitness is the measure of reproductive success which would result in more offspring which would contribute more to the gene pool of the next generation. This term is typically used in subjects such as evolutionary biology.

Detailed explanation-3: -In biology, fitness is the ability of an organism to survive and reproduce.

Detailed explanation-4: -Fitness describes an organism’s ability to survive and reproduce in a particular environment. Organisms with a high level of fitness for a particular environment have traits that are suitable to the environment in which they live, allowing them to thrive and reproduce.

Detailed explanation-5: -Fitness is just book-keeping; survival and differential reproduction result from natural selection, which actually is a driving mechanism in evolution. Organisms which are better suited to their environment will reproduce more and so increase the proportion of the population with their traits.