Q: A population of rabbits has a carrying capacity ($$K) of 500. If $$the population size ($$N) is 250 $$and the intrinsic rate of increase ($$r) is 0.1$$, what is the expected population growth rate according to the logistic growth model?

$$dN/dt = rN \left(1 - \frac{N}{K}\right) = 0.1 \times 250 \left(1 - \frac{250}{500}\right) = 12.5$$

Question 1

Which of the following best describes the Hardy-Weinberg equilibrium?

Accepted Answer

A population in which allele and genotype frequencies remain constant from generation to generation in the absence of evolutionary forces.

Question 2

If the frequency of allele $$p is 0.7 $$and allele $$q is 0.3 in a $$population at Hardy-Weinberg equilibrium, what is the expected frequency of heterozygotes?

Accepted Answer

$$2pq = 0.42$$

Question 3

Which mechanism of evolution is most likely responsible for the fixation of a harmful allele in a small population?

Accepted Answer

Genetic drift

Question 4

A population of lizards is separated by a river, preventing gene flow between the two groups. Over time, the two groups evolve into distinct species. This is an example of:

Accepted Answer

Allopatric speciation

Question 5

Which of the following is NOT an assumption of the Hardy-Weinberg Principle?

Accepted Answer

High rates of natural selection

Question 6

Which of the following best illustrates convergent evolution?

Accepted Answer

The development of wings in bats and birds for flight.

Question 7

Which equation represents the Hardy-Weinberg equilibrium for genotype frequencies?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 8

Which of the following is an example of a biotic factor affecting the distribution of organisms?

Accepted Answer

Predation

Question 9

A population of rabbits has a carrying capacity ($$K) of 500. If $$the population size ($$N) is 250 $$and the intrinsic rate of increase ($$r) is 0.1$$, what is the expected population growth rate according to the logistic growth model?

Accepted Answer

$$dN/dt = rN \left(1 - \frac{N}{K}ight) = 0.1 	imes 250 \left(1 - \frac{250}{500}ight) = 12.5$$

Question 10

Which of the following is a density-dependent factor that can regulate population size?

Accepted Answer

Predation

Question 11

Which biome is characterized by low precipitation, extreme temperature fluctuations, and sparse vegetation?

Accepted Answer

Desert

Question 12

Which of the following best describes resource partitioning in a community?

Accepted Answer

Species dividing resources to minimize competition.

Question 13

Which process is primarily responsible for the movement of carbon from the atmosphere into living organisms?

Accepted Answer

Photosynthesis

Question 14

Which of the following is an example of mutualism?

Accepted Answer

Bees pollinating flowers while obtaining nectar

Question 15

Which of the following is a consequence of biological magnification?

Accepted Answer

Increased concentration of toxins in organisms higher up the food chain.

Question 16

Which of the following is a direct result of ozone ($$O_3) $$depletion?

Accepted Answer

Increased ultraviolet radiation reaching Earth's surface

Question 17

Which of the following best describes the difference between primary and secondary succession?

Accepted Answer

Primary succession occurs after a disturbance removes all soil and organisms, while secondary succession occurs where soil remains after disturbance.

Question 18

Which of the following is NOT a characteristic of r-selected species?

Accepted Answer

Large body size

Question 19

Which of the following is an example of character displacement?

Accepted Answer

Two bird species evolving different beak sizes when living in the same area.

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