Question : What are the factors affecting population growth ?

1.	Question : What are the factors affecting population growth ?
Answer» Solution :• The size of population is not STATIC. It keeps changing with time, depending upon food availability, PREDATION pressure and reduces weather. The main factors that DETERMINE the population growth are : • Natality (number of birth during a GIVEN period in the population) • Mortality (number of death during a given period in the population) • Immigration (individual of same species that have come into the habitat) • Emigration (individual of population that have left the habitat) • • If .N. is the population density at a time.t., then its density at time t + 1 is `N_(1+1) = N_1 + [(B + 1) - (D + E)] ` • Population density will increase if the number of births plus the number of immigrants `(B + I)` is more than the number of DEATHS plus the number of emigrants `(D + E)`, otherwise it will decrease.

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