Question 1

Which of the following best describes a population in the context of population ecology?

Accepted Answer

A group of individuals from the same species living in the same area at the same time.

Question 2

Which process does NOT directly affect the number of individuals present in a population according to demography?

Accepted Answer

Mutation

Question 3

A population of brown bears in Alaska has a density of 0.5 bears per square kilometer. If the area is 2000 square kilometers, what is the estimated population size?

Accepted Answer

$$0.5 	imes 2000 = 1000$$

Question 4

Which survivorship curve is most likely to be observed in humans, and what does it indicate?

Accepted Answer

Type I; low mortality in young, most survive to old age.

Question 5

Which of the following is an example of population dispersal?

Accepted Answer

Killfish eggs surviving passage through a swan's digestive tract and being deposited in a new wetland.

Question 6

If a population has high fecundity, which of the following traits is it most likely to exhibit?

Accepted Answer

Many small offspring and early maturity.

Question 7

Which equation correctly represents the change in population size ($$\Delta N) $$over time, considering births ($$B$$), deaths ($$D$$), immigration ($$I$$), and emigration ($$E$$)?

Accepted Answer

$$\Delta N = B - D + I - E$$

Question 8

Which of the following best describes a fitness trade-off in life history strategies?

Accepted Answer

Organisms must allocate limited resources between growth, reproduction, and survival.

Question 9

A life table summarizes which of the following aspects of a population?

Accepted Answer

The probability that an individual will survive and reproduce at each age.

Question 10

Which population would most likely have a Type III survivorship curve?

Accepted Answer

Many insects and plants with high juvenile mortality.

Question 11

If a population of cattails in a pond has a density of 10 per square meter and the pond is 100 square meters, what is the total number of cattails?

Accepted Answer

$$10 	imes 100 = 1000$$

Question 12

Which of the following is NOT a trait associated with high survivorship in life-history strategies?

Accepted Answer

Short life span

Question 13

Which real-world scenario best illustrates the concept of population abundance?

Accepted Answer

Counting the number of brown bears in Alaska.

Question 14

Which of the following statements about population density is correct?

Accepted Answer

Population density is the number of individuals per unit area.

Question 15

Which of the following is a direct consequence of limited resources in an organism's environment?

Accepted Answer

Fitness trade-offs between survival, growth, and reproduction.

Question 16

Which of the following best describes the difference between high fecundity and high survivorship strategies?

Accepted Answer

High fecundity strategies invest in many small offspring with early maturity, while high survivorship strategies invest in few large offspring with late maturity.

Question 17

Which of the following is NOT a factor that determines the distribution and abundance of organisms?

Accepted Answer

Genetic mutation rates

Question 18

A population of songbirds has a constant mortality rate throughout its life. Which survivorship curve does this represent?

Accepted Answer

Type II

Question 19

Which of the following is a plausible fitness trade-off for a plant species in a resource-poor environment?

Accepted Answer

Producing many small seeds with little investment in each.

Question 20

Which of the following best explains why life-history traits form a continuum?

Accepted Answer

Because organisms balance trade-offs between fecundity and survivorship based on environmental pressures.

Population Ecology: Distribution, Abundance, and Life History (General Biology Study Notes)

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