Question 1

Which of the following best describes the difference between taxonomy and systematics?

Accepted Answer

Taxonomy is the naming and classification of organisms, while systematics studies evolutionary relationships among organisms.

Question 2

A scientist is constructing a phylogenetic tree using both morphological and molecular data. Which of the following statements is TRUE regarding the use of these data types?

Accepted Answer

Molecular data can help resolve relationships when morphological data are ambiguous or convergent.

Question 3

Which of the following is an example of convergent evolution?

Accepted Answer

Wings of bats and wings of birds, which evolved independently for flight.

Question 4

Which of the following best describes a monophyletic group?

Accepted Answer

A group that includes an ancestor and all of its descendants.

Question 5

A population of rabbits in a field grows from 100 to 400 individuals in 2 years. Assuming exponential growth, which equation would you use to calculate the intrinsic rate of increase ($$r$$)?

Accepted Answer

$$N_t = N_0$ e$$^{rt}$$

Question 6

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

Accepted Answer

A contagious disease spreading more rapidly as population density increases.

Question 7

In a boom-and-bust population cycle, which of the following is most likely to occur?

Accepted Answer

Population size rapidly increases, then crashes due to resource depletion.

Question 8

Which of the following best describes the competitive exclusion principle?

Accepted Answer

Two species competing for the same limiting resource cannot coexist indefinitely.

Question 9

A researcher observes that two species of finches on an island feed on similar seeds, but one species shifts to eating insects when the other is present. This is an example of:

Accepted Answer

Resource partitioning

Question 10

Which of the following interactions is correctly matched with its description?

Accepted Answer

Parasitism: One organism benefits, the other is harmed.

Question 11

In a food web, which of the following best describes the role of primary producers?

Accepted Answer

They convert solar energy into chemical energy through photosynthesis.

Question 12

Which equation best represents the logistic growth of a population?

Accepted Answer

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

Question 13

Which of the following best explains why energy transfer between trophic levels is inefficient?

Accepted Answer

Most energy is lost as heat due to metabolism and respiration.

Question 14

A community with high species diversity is likely to:

Accepted Answer

Be more resilient to environmental disturbances.

Question 15

Which of the following is an example of mutualism?

Accepted Answer

Bees pollinating flowers while obtaining nectar.

Question 16

If only 10% of the energy at one trophic level is transferred to the next, how much energy would be available to secondary consumers if primary producers capture 10,000 kcal?

Accepted Answer

100 kcal

Question 17

Which of the following best describes character displacement?

Accepted Answer

Species evolve differences in traits to minimize competition where they co-occur.

Question 18

Which of the following is NOT a likely outcome of interspecific competition?

Accepted Answer

Increased resource availability for both species.

Question 19

Which of the following best describes the role of decomposers in an ecosystem?

Accepted Answer

They recycle nutrients by breaking down dead organic matter.

Question 20

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

Accepted Answer

A severe frost killing most plants in a region.

General Biology Study Guide: Evolutionary History, Population Ecology, and Community Ecology

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