Question 1

Which of the following best describes the factors that produce a clumped dispersion pattern in populations, as shown in the first circle of the diagram?

Accepted Answer

Resources are patchy and individuals group together for protection or mating.

Question 2

In the demographic transition model, which stage is characterized by a rapid decrease in death rate while the birth rate remains high, leading to a sharp increase in population size?

Accepted Answer

Stage 2

Question 3

Given the community diagrams, which community has the highest species evenness?

Accepted Answer

Community D

Question 4

In the food web diagram, which organism is a primary consumer?

Accepted Answer

Rabbit

Question 5

Which process in the nitrogen cycle diagram is responsible for converting atmospheric $$N_2$$ into a form usable by plants?

Accepted Answer

Nitrogen fixation

Question 6

Which dispersion pattern is most likely to result from strong competition for resources, as shown in the third circle of the diagram?

Accepted Answer

Uniform

Question 7

During which stage of the demographic transition does the birth rate begin to fall rapidly, while the death rate continues to fall but at a slower rate?

Accepted Answer

Stage 3

Question 8

Which community in the diagram has the lowest species richness?

Accepted Answer

Community C

Question 9

In the food web, which population would have the most energy and mass?

Accepted Answer

Grass

Question 10

Which process in the nitrogen cycle diagram is responsible for converting $$NH_4$$^+$$ into NO_3$^-$$?

Accepted Answer

Nitrification

Question 11

Which dispersion pattern, as shown in the middle circle of the diagram, is most likely to occur when environmental conditions are unpredictable and resources are evenly distributed?

Accepted Answer

Random

Question 12

In the demographic transition model, what happens to the population size during Stage 4?

Accepted Answer

It stabilizes.

Question 13

Which community in the diagram has the highest species richness?

Accepted Answer

Community A

Question 14

In the food web, which organism is an autotroph?

Accepted Answer

Grass

Question 15

Which process in the nitrogen cycle diagram is responsible for converting $$NO_3$$^-$$ back to atmospheric N_2$?

Accepted Answer

Denitrification

Question 16

Which dispersion pattern is most likely to be observed in populations of plants whose seeds are dispersed by wind?

Accepted Answer

Random

Question 17

During which stage of the demographic transition does the population growth rate begin to slow down due to declining birth rates?

Accepted Answer

Stage 3

Question 18

Which community in the diagram has the highest dominance by a single species?

Accepted Answer

Community C

Question 19

In the food web, which organism is a tertiary consumer?

Accepted Answer

Fox

Question 20

Which process in the nitrogen cycle diagram is responsible for converting organic nitrogen in dead organisms into $$NH_4$$^+$$?

Accepted Answer

Ammonification

Factors Producing Different Dispersion Patterns in Populations

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