Q: A population of rabbits in a field grows according to the logistic growth model. If the carrying capacity ($$K) is 500 $$and the current population size ($$N) is 250$$, with an intrinsic rate of increase ($$r) of 0.2$$, what is the expected population growth rate ($$\Delta N/\Delta t$$)? Use the logistic growth equation: $$\Delta N/\Delta t = rN \left(1 - \frac{N}{K}\right)$$

$$\Delta N/\Delta t = 0.2 \times 250 \times \left(1 - \frac{250}{500}\right) = 25$$

Question 1

Which of the following is a synapomorphy shared by fungi and animals within the Opisthokonts?

Accepted Answer

Flagellated cells with a single posterior flagellum

Question 2

A mycorrhizal fungus forms a mutualistic relationship with plant roots. Which morphological feature of fungi best supports this function?

Accepted Answer

Extensive network of hyphae increasing surface area for nutrient exchange

Question 3

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

Accepted Answer

Logistic growth slows as population approaches carrying capacity, exponential does not

Question 4

A population of rabbits in a field grows according to the logistic growth model. If the carrying capacity ($$K) is 500 $$and the current population size ($$N) is 250$$, with an intrinsic rate of increase ($$r) of 0.2$$, what is the expected population growth rate ($$\Delta N/\Delta t$$)?

Use the logistic growth equation:

$$\Delta N/\Delta t = rN \left(1 - \frac{N}{K}\right)$$

Accepted Answer

$$\Delta N/\Delta t = 0.2 	imes 250 	imes \left(1 - \frac{250}{500}ight) = 25$$

Question 5

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

Accepted Answer

A severe hurricane

Question 6

Which of the following best describes the difference between a fundamental niche and a realized niche?

Accepted Answer

A realized niche is the set of conditions actually used by a species, limited by biotic interactions

Question 7

In a food chain, if only 10% of energy is transferred from one trophic level to the next, how much energy is available to secondary consumers if primary producers capture 10,000 kcal of energy?

Accepted Answer

100 kcal

Question 8

Which of the following is a proximate explanation for why birds migrate seasonally?

Accepted Answer

Birds migrate because changes in day length trigger hormonal changes

Question 9

Which of the following is NOT a characteristic shared by all animals?

Accepted Answer

Cell walls made of cellulose

Question 10

Which adaptation was critical for vertebrates to successfully colonize land?

Accepted Answer

Amniotic egg

Question 11

Which of the following is an example of K-selection life history traits?

Accepted Answer

Late reproduction, few offspring, high parental investment

Question 12

Which of the following best describes the greenhouse effect?

Accepted Answer

Greenhouse gases trap infrared radiation, warming the Earth's surface

Question 13

Which of the following is a learned behavior acquired through classical conditioning?

Accepted Answer

A dog salivating when it hears a bell after repeated association with food

Question 14

Which of the following is a major reservoir in the carbon cycle?

Accepted Answer

Atmosphere

Question 15

Which of the following is an example of mutualism?

Accepted Answer

Bees pollinating flowers while collecting nectar

Question 16

According to the intermediate disturbance hypothesis, which community would likely have the highest species richness?

Accepted Answer

A community with moderate, periodic disturbance

Question 17

Which of the following is a consequence of competitive exclusion in a community?

Accepted Answer

One species is eliminated from the community

Question 18

Which of the following is a primary succession event?

Accepted Answer

Colonization of bare rock after a volcanic eruption

Question 19

Which of the following is a major threat to biodiversity?

Accepted Answer

Habitat destruction

Question 20

A climograph shows a biome with high annual precipitation and consistently warm temperatures. Which biome is most likely represented?

Accepted Answer

Tropical rainforest

BI223 Final Exam Study Guide: Fungi, Animal Diversity, Behavioral Ecology, and Ecology

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