Question 1

Which of the following best describes the difference between exponential and logistic population growth?

Accepted Answer

Exponential growth occurs when resources are unlimited, resulting in a J-shaped curve, while logistic growth occurs when resources are limited, resulting in an S-shaped curve.

Question 2

A population of 500 rabbits has a per capita birth rate of 0.2 and a per capita death rate of 0.1 per year. What is the annual change in population size ($$\frac{dN}{dt}$$)?

Accepted Answer

$$\frac{dN}{dt} = 50$$

Question 3

Which of the following is an example of a density-dependent factor affecting population growth?

Accepted Answer

Competition for food among individuals in a population

Question 4

A fish population in a pond has a carrying capacity ($$K) of 1$$,000 and a current population size ($$N) of 600. If$$ $$r_{max} = 0.5$$, what is the expected population growth rate ($$\frac{dN}{dt}) $$for the next year?

Accepted Answer

$$\frac{dN}{dt} = 120$$

Question 5

Which survivorship curve is typical of species that produce many offspring, most of which die young, but a few survive to old age?

Accepted Answer

Type III

Question 6

Which of the following best explains why red kangaroos are found only in arid inland areas of Australia?

Accepted Answer

They are adapted to feeding on grasses that grow in those areas.

Question 7

Which pattern of population dispersion is most likely to result from territorial behavior in animals?

Accepted Answer

Uniform

Question 8

A population of insects exhibits semelparity. Which of the following best describes their reproductive strategy?

Accepted Answer

They reproduce only once in their lifetime, producing many offspring.

Question 9

Which of the following equations correctly represents the logistic growth model?

Accepted Answer

$$\frac{dN}{dt} = r$$_{max}$$N \left( \frac{K-N}{K} \right)$$

Question 10

Which of the following is NOT a factor that affects biotic potential?

Accepted Answer

Amount of sunlight in the environment

Question 11

A population of 1,200 birds has a birth rate of 0.25 and a death rate of 0.15 per year. What is the per capita rate of increase ($$r$$)?

Accepted Answer

$$r = 0.10$$

Question 12

Which of the following best describes a population at carrying capacity?

Accepted Answer

The birth rate equals the death rate.

Question 13

Which of the following is an example of a density-independent factor?

Accepted Answer

A severe drought reducing water availability

Question 14

Which of the following statements about K-selected species is correct?

Accepted Answer

They tend to have fewer offspring and provide more parental care.

Question 15

A population of 2,000 fish is growing at its maximum rate ($$r_{max} = 0.8) $$with unlimited resources. How many fish will be added to the population in one year?

Accepted Answer

1,600

Question 16

Which of the following best explains why cedar trees tend to be clumped near the parent plant?

Accepted Answer

Their seeds are not widely dispersed.

Question 17

Which of the following is a primary goal of modern ecology?

Accepted Answer

To develop models that explain and predict the distribution and abundance of organisms

Question 18

Which of the following is true about iteroparity?

Accepted Answer

Individuals reproduce multiple times throughout their lives.

Question 19

Which of the following best describes the role of an ecotone?

Accepted Answer

It is a transition zone where organisms from adjacent ecosystems interact.

Question 20

A population pyramid with a broad base and narrow top most likely represents which of the following?

Accepted Answer

A rapidly growing population with a high proportion of young individuals

Population Ecology: Dynamics, Growth Models, and Demographics

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