Question 1

Which of the following best describes the scientific field of ecology?

Accepted Answer

The study of the distribution and abundance of organisms and the interactions that determine these patterns.

Question 2

Which two main components drive the formation of terrestrial biomes?

Accepted Answer

Temperature and precipitation

Question 3

A population of deer mice is studied over several years. Which variable would most directly impact the population size?

Accepted Answer

The reproductive rate of the deer mice

Question 4

Which of the following is an example of a biotic factor that can limit the distribution of a species?

Accepted Answer

Competition

Question 5

In aquatic biomes, which factor is most likely to limit photosynthetic productivity?

Accepted Answer

Nutrient availability

Question 6

Which biome is characterized by high solar radiation, high rainfall, and the highest biological diversity?

Accepted Answer

Tropical forest

Question 7

What is the primary reason for extreme seasonality in high-latitude regions?

Accepted Answer

The tilt of Earth's axis and its annual passage around the sun

Question 8

Which equation best represents the population growth rate in population ecology?

Accepted Answer

$$ \frac{dN}{dt} = rN $$

Question 9

A mountain range creates two distinct environments on either side. What is the most likely ecological difference between the two sides?

Accepted Answer

One side will be wetter and support more lush vegetation, while the other will be drier and support less vegetation.

Question 10

Which of the following is a direct consequence of increased greenhouse gases in the atmosphere?

Accepted Answer

Increased frequency of extreme weather events

Question 11

Which biome is maintained by fire and grazing herbivores, and is prized for agriculture?

Accepted Answer

Temperate grassland

Question 12

Which of the following best explains why deserts are found near 30° north and south latitude?

Accepted Answer

Descending dry air absorbs moisture, creating arid climates.

Question 13

Which term describes the movement of individuals or gametes away from their area of origin, contributing to global distribution?

Accepted Answer

Dispersal

Question 14

Which of the following is an abiotic factor in an ecosystem?

Accepted Answer

Temperature

Question 15

A researcher observes a group of bison grazing in a grassland. Which level of ecological study does this represent?

Accepted Answer

Population ecology

Question 16

Which equation describes the logistic growth of a population?

Accepted Answer

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

Question 17

Which biome is dominated by conifer trees, has a short growing season, and is susceptible to pest outbreaks?

Accepted Answer

Boreal forest (taiga)

Question 18

Which of the following is a characteristic of aquatic biomes?

Accepted Answer

Zonation based on light, pressure, and nutrients

Question 19

Which factor is most likely to increase phytoplankton population growth in oceanic regions?

Accepted Answer

Upwelling of cold, nutrient-rich water

Question 20

Which of the following best describes convergent evolution in biomes?

Accepted Answer

Unrelated species evolve similar traits due to similar environmental pressures.

Ecology and the Biosphere: Climate, Biomes, and Species Distribution

Study Guide - Practice Questions