NEET BIOLOGY

Detailed explanation-1: -Genetic Variation is Essential for Evolution by Natural Selection. For natural selection to occur, a population must have a wide variety of individuals with different traits.

Detailed explanation-2: -Natural selection requires heritable variation in a given trait, and differential survival and reproduction associated with possession of that trait.

Detailed explanation-3: -Competition, disease, predation, and abiotic conditions are among the most important limiting factors in ecological systems, and they quite often shape the path of natural selection.

Detailed explanation-4: -Genetic variations that alter gene activity or protein function can introduce different traits in an organism. If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation (a process known as natural selection).

Detailed explanation-5: -Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others.