Q: A population of deer in a forest is experiencing exponential growth. If the initial population size ($$N_0) is 100 $$and the per capita growth rate ($$r) is 0.05 $$per year, what will the population size ($$N) be $$after 10 years? Use the exponential growth equation: $$N = N_0$ e$$^{rt}$$.

$$N \approx 100 \times e$$^{0.5}$$ \approx 164$$

Question 1

Which of the following best describes the concept of carrying capacity ($$K) in $$population ecology?

Accepted Answer

The maximum number of individuals that can be supported indefinitely by the available resources in an environment.

Question 2

A population of deer in a forest is experiencing exponential growth. If the initial population size ($$N_0) is 100 $$and the per capita growth rate ($$r) is 0.05 $$per year, what will the population size ($$N) be $$after 10 years? Use the exponential growth equation: $$N = N_0$ e$$^{rt}$$.

Accepted Answer

$$N \approx 100 	imes e$$^{0.5}$$ \approx 164$$

Question 3

Which of the following scenarios best illustrates density-dependent regulation of population growth?

Accepted Answer

A disease spreads more rapidly as the population density increases, causing higher mortality rates.

Question 4

Which equation correctly represents logistic population growth?

Accepted Answer

$$\frac{dN}{dt} = rN \left(1 - \frac{N}{K}\right)$$

Question 5

In a population of ground squirrels, survivorship is constant across all ages. Which survivorship curve type does this represent?

Accepted Answer

Type II

Question 6

A population of salmon reproduces once in its lifetime and then dies. This reproductive strategy is known as:

Accepted Answer

Semelparity

Question 7

Which of the following factors is most likely to cause a population to shift from exponential to logistic growth?

Accepted Answer

Increasing competition for limited resources as population density rises.

Question 8

If a population has a per capita birth rate ($$b) of 0.04 $$and a per capita death rate ($$d) of 0.02$$, what is the per capita growth rate ($$r$$)?

Accepted Answer

$$r = b - d = 0.04 - 0.02 = 0.02$$

Question 9

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

Accepted Answer

A severe drought reduces water availability for all individuals, regardless of population size.

Question 10

Why is it important to focus on reproductive individuals when studying population dynamics?

Accepted Answer

Only individuals capable of reproducing contribute directly to future population growth.

Question 11

Which of the following best describes the trade-off between offspring quantity and quality in life history strategies?

Accepted Answer

Producing many offspring often results in lower investment per offspring, reducing their chances of survival.

Question 12

A population of frogs in a pond has a birth rate that increases when food is abundant and decreases when food is scarce. This is an example of:

Accepted Answer

Density-dependent birth rate

Question 13

Which of the following statements about exponential growth is correct?

Accepted Answer

Exponential growth occurs when resources are unlimited and population size increases rapidly.

Question 14

In a population with a Type III survivorship curve, which of the following is most likely true?

Accepted Answer

Most individuals die young, but those that survive live to old age.

Question 15

Which of the following would NOT be considered a major theme in population ecology?

Accepted Answer

Examining the molecular structure of DNA in individual organisms.

Question 16

A population of rabbits is introduced to an island with unlimited resources. Which growth pattern would you expect initially?

Accepted Answer

Exponential growth

Question 17

Which of the following best explains why population dispersion patterns (clumped, uniform, random) are important to study?

Accepted Answer

They reveal how individuals interact with each other and their environment, affecting resource use and survival.

Question 18

Which of the following is a key difference between semelparity and iteroparity?

Accepted Answer

Semelparous organisms reproduce once and then die, while iteroparous organisms reproduce multiple times over their lifetime.

Question 19

Which of the following is most likely to occur as a population approaches its carrying capacity ($$K$$)?

Accepted Answer

The population growth rate slows down due to increased competition for resources.

Population Ecology: Principles, Dynamics, and Life History Strategies

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