NEET 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: -Evolutionary biologists use the word fitness to describe how good a particular genotype is at leaving offspring in the next generation relative to other genotypes. So if brown beetles consistently leave more offspring than green beetles because of their color, you’d say that the brown beetles had a higher fitness.

Detailed explanation-3: -To construct the fitness curve, we recommend that offspring fitness be measured as survival up to the age at which the instantaneous rate of offspring mortality becomes random with respect to initial investment.

Detailed explanation-4: -Why do organisms with greater fitness generally leave more offspring than organisms that are less fit? the organism is better adapted to their environment than the other organism.