Question
Biology Question on organisms and populations
The correct statement is
In a population, number of birth is different from birth rate.
A sigmoid growth curve is depiction of exponential growth.
In a logistic growth curve the asymptote is beyond the carrying capacity.
r is equal to the difference between number of births and number of deaths in a population.
In a population, number of birth is different from birth rate.
Solution
Birth, i.e., production of new offspring is an attribute of an individual whereas birth rate i.e., production of new individuals per unit population per unit time is an attribute of population. A sigmoid growth curve is depiction of logistic growth, a more realistic growth model where individuals compete for limited resources and the fittest individual survives and reproduces. In an exponential growth curve (J-shape curve) the asymptote, is beyond carrying capacity as resources are unlimited. V is intrinsic rate of natural increase.