NEET BIOLOGY

Detailed explanation-1: -Immigration is when new organisms join a population, changing allele frequencies. Emigration is when members of a population leave, taking with them their genes. These change the overall balance of the gene pool of the populations these species join or leave.

Detailed explanation-2: -Migration. Migration is the movement of individual organisms into, or out of, a population. Migration affects population growth rate.

Detailed explanation-3: -The movement of individuals into a population is called immigration.

Detailed explanation-4: -Dispersal is an ecological process that involves the movement of an individual or multiple individuals away from the population in which they were born to another location, or population, where they will settle and reproduce.