Deck 11: Population Growth

Question 1

Logistic population growth produces a(n) ________ population growth curve.

A) J-shaped
B) K-shaped
C) N-shaped
D) R-shaped
E) S-shaped

Answer 1

E

Question 2

If the age distribution diagram is bottom heavy or pyramidal in shape, this indicates that the population is

A) stable.
B) declining.
C) growing slowly.
D) growing rapidly.
E) cannot be determined

Answer 2

D

Question 3

If the age distribution diagram is bell shaped or the number of individuals in each age class is evenly distributed, this indicates that the population is

A) stable.
B) declining.
C) growing slowly.
D) growing rapidly.
E) not able to be determined.

Answer 3

A

Question 4

An annual plant when initially colonizing an area will probably demonstrate

A) annual growth rate.
B) geometric population growth.
C) exponential growth rate.
D) logistic growth.
E) None of the choices are correct.

Question 5

If the initial population size is 996 plants and the geometric rate of increase is 2.4177, calculate the population size after eight years for the annual plant Phlox drummondii.

A) 198,918
B) 480,924
C) 1,162,730
D) 2,811,131
E) cannot be determined with the information given

Question 6

Growth by any population with pulsed reproduction can be modeled as

A)
B)
C)
D)

Question 7

In the logistic model of population growth if r>0 then

A) the population declines.
B) population growth stops.
C) N>K.
D) NE) both the population declines and N

Question 8

Which of the following is/are mismatched?

A) r_max = intrinsic rate of increase
B) K = carrying capacity
C) N_t = annual growth rate
D) t = time interval
E) dN/dt = rate of population change

Question 9

The exponential population growth equation can be used for

A) populations with overlapping generations.
B) populations experiencing continuous growth.
C) populations with nonpulsed reproduction.
D) populations with overlapping generations and populations experiencing continuous growth.
E) populations with overlapping generations, populations experiencing continuous growth, and populations with nonpulsed reproduction.

Question 10

The best model for population growth of an annual plant like Phlox drummondii is

A) geometric growth.
B) exponential growth.
C) logistic growth.
D) geometric growth during years with high rainfall and exponential growth during years with low rainfall.
E) geometric growth during years with high rainfall and logistic growth during years with low rainfall.

Question 11

Logistic growth has been documented in which of the following populations?

A) Eurasian collared dove
B) Barnacle, Balanus balanoides
C) Yeast, Saccharomyces cerevisiae
D) Northern elephant seal
E) All of the choices are correct.

Question 12

dN/dt = r_maxN [(K - N)/K] represents

A) annual growth rate.
B) geometric population growth.
C) exponential growth rate.
D) logistic growth.
E) None of the choices are correct.

Question 13

If the age distribution diagram has the smallest concentration of individuals in the bottom portion or is considered to be an urn shape, this indicates that

A) the population is stable.
B) the population is declining.
C) the population is growing slowly.
D) the population is growing rapidly.
E) This answer cannot be determined.

Question 14

Density dependent factors include all of the following except

A) competition.
B) disease.
C) predation.
D) temperature.
E) None of the choices are correct.

Question 15

"N/K" for a population can represent

A) environmental resistance.
B) logistic component.
C) population size decrease.
D) both environmental resistance and logistic component.
E) both logistic component and population size decrease.

Question 16

Human populations are clumped on a large scale with the greatest concentration in

A) Africa.
B) Europe.
C) Asia.
D) North America.
E) South America.

Question 17

The factors that determine carrying capacity include all of the following except

A) space.
B) disease.
C) food.
D) competition.
E) None of the choices are correct.

Question 18

N_t = N₀ λ^t represents

A) geometric population growth.
B) annual growth rate.
C) exponential growth rate.
D) logistic growth.
E) None of the choices are correct.

Question 19

dN/dt = r_maxN represents

A) annual growth rate.
B) geometric population growth.
C) exponential population growth.
D) logistic growth.
E) None of the choices are correct.

Question 20

Which of the following statements is/are true?

A) Population growth in humans can be represented by an S curve.
B) The human population has reached carry capacity.
C) Population growth in humans is exponential.
D) Human population growth is not effected by density dependent factors.
E) Both population growth in humans can be represented by an S curve and the human population has reached carry capacity.

Question 21

Grant and Grants' study on the large cactus finches (Geospiza conirostris) positively correlates ________ and egg clutches.

Question 22

In the logistic model of population growth if N>K then

A) r is zero.
B) the population expands.
C) r is negative.
D) the population declines.
E) both r is negative and the population declines.

Question 23

The biotic potential of an organism produces the leveling off at carrying capacity in the logistic growth curve.

Question 24

Occasionally, density independent factors can influence populations in a density dependent manner.

Question 25

A population is ________ if N>K and the per capita rate of increase is negative.

Question 26

In the most basic terms, a population's growth is a function of births and deaths.

Question 27

What is a valid explanation for why unlimited population growth cannot be maintained for many generations? (Select all that apply.)

A) The population would soon run out of space for new individuals.
B) The population would soon run out of food resources.
C) By definition, exponential growth requires low population densities.
D) Individuals would not have sufficient breeding opportunties.

Question 28

In a logistic model, when N = K the population stops growing and r = 0.

Question 29

In the logistic model of population growth if r<0 then

A) the population expands.
B) the population declines.
C) N>K.
D) N=K.
E) both the population declines and N>K.