Question

Which of the following statements about exponential growth is false? Select one: a. Exponential growth does not add more individuals as N gets larger. O b. In reality, it is not possible for exponential population growth to continue indefinitely. C. Increases in the size of the population do not affect growth rate (r). O d. exponential growth doesn't depend on the number of individuals (N) in the population. Clear my choice A J-shaped population growth curve becomes an S-shaped one TOT ding Select one a. as more resources become available. O b. as the carrying capacity is reached. c. If the data are plotted on semi-log graph paper. d. if reproduction stops.

Answer 1

Question 1

Answer: (a) Exponential growth does not add more individuals as N gets larger.-( FALSE)

Explanation:

In a population with exponential growth, whether the N(population size/number) is large or small the population will continue to grow at a constant rate and follow the exponential growth curve.

*option "b" is TRUE- in reality, any population will face either environmental resistance or will suffer from lack of biotic potential. So, it can't follow an exponential growth indefinitely.

*option "c" is TRUE.-in exponential growth the "r"(growth rate) is constant and it doesn't depend on the increase in the population size.

*option "d" is TRUE- it is a property of exponential growth of a population that it doesn't depend on the number of individuals in the population(N).

Question 2

Answer: (b) as the carrying capacity is reached.

Explanation:

In the "J " shaped population curve, the population increases in an exponential way in the presence of abundant resources and the growth rate is increasing with time.

But, Once the size of the individual organism gets bigger and the resources are becoming limited the growth rate of the population starts to get smaller and eventually the population reaches a plateau when the carrying capacity of the population is reached and maintains almost a steady growth rate.

Hence the "J" shaped curve now becomes "S" shaped.

* option "a" is incorrect- if more resources are available the population would have been continuing the exponential growth.

* option "c" is also incorrect- we can't get an "S" shaped curve by plotting the "J" shaped curve's data on the semi-log graph paper.

* option"d" is also incorrect- if reproduction stops the population size will continue to fall because after some time the members of the population will start to die. So, it will not result in an "S" shaped curve.