The model of exponential population growth predicts that the per capita population growth rate, r Select one:.
a. fluctuates on a regular cycle.
b. gets smaller as a population gets larger.
c. Is always at its maximum level (rmax).
d. does not change as the population gets larger.
e. gets larger as a population gets larger

Explanation:

The model of exponential population growth predicts that the per capita population growth rate, r :

d. does not change as the population gets larger.

A population shows exponential growth if there is no limitation on growth. All members have abundant resource availability and the population displays its intrinsic rate of increase.This is also known as geometric growth .In geometric growth, rate of increase is expressed as a constant fraction or an exponent by which a particular population is multiplied.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

i don't know. if i were you, i would search it up online : d