Q: Which equation would you use to calculate the amount of sunlight per unit area at a given latitude ($$\theta$$), assuming the maximum intensity at the equator is $$I_0$$?

$$I = I_0$ \times \sin(\theta)$$

Question 1

Which of the following best describes the focus of ecosystem ecology?

Accepted Answer

The study of how energy flows and nutrients cycle through the environment.

Question 2

Sockeye salmon migrate from ocean to freshwater environments to breed. Which level of ecological study does this behavior best illustrate?

Accepted Answer

Organismal ecology

Question 3

Why does solar radiation per unit area decrease with increasing latitude?

Accepted Answer

The angle of incoming sunlight is lower at higher latitudes, spreading energy over a larger area.

Question 4

Which of the following is a direct consequence of Hadley cell circulation at the equator?

Accepted Answer

High precipitation and warm temperatures

Question 5

A population of sockeye salmon produces thousands of eggs, but only a few offspring survive to adulthood. Which ecological concept does this scenario best illustrate?

Accepted Answer

Population dynamics

Question 6

Which equation best represents the relationship between population growth rate ($$r$$), birth rate ($$b$$), and death rate ($$d$$)?

Accepted Answer

$$r = b - d$$

Question 7

Which biome is characterized by ground that is completely frozen for most of the year and low precipitation?

Accepted Answer

Arctic tundra

Question 8

Which of the following aquatic biomes is most likely to have high nutrient levels due to seasonal turnovers?

Accepted Answer

Lakes and ponds

Question 9

A mountain range causes one side to be lush and the other side to be dry. What is the term for this phenomenon?

Accepted Answer

Rain shadow effect

Question 10

Which of the following best explains why estuaries are considered highly productive ecosystems?

Accepted Answer

They receive nutrients from both rivers and the ocean, supporting diverse organisms.

Question 11

Which factor is most responsible for the seasonality of weather on Earth?

Accepted Answer

The tilt of Earth's axis relative to its orbit around the sun.

Question 12

Which of the following is a biotic factor that could affect the distribution of sockeye salmon?

Accepted Answer

Predator presence

Question 13

Which aquatic biome is defined by shallow water, emergent vegetation, and high productivity?

Accepted Answer

Freshwater wetlands

Question 14

Which of the following statements about ocean zones is correct?

Accepted Answer

The aphotic zone is deeper and receives no sunlight.

Question 15

If a species is hot-adapted and has a wider tolerance range, what does this imply about its ability to survive temperature fluctuations?

Accepted Answer

It can survive in a broad range of temperatures.

Question 16

Which of the following is an example of a real-world application of community ecology?

Accepted Answer

Studying how salmon are prey for bears and predators for smaller fish.

Question 17

Which equation would you use to calculate the amount of sunlight per unit area at a given latitude ($$	heta$$), assuming the maximum intensity at the equator is $$I_0$$?

Accepted Answer

$$I = I_0$ 	imes \sin(	heta)$$

Question 18

Which of the following best describes the role of cyanobacteria in lakes and ponds?

Accepted Answer

They are primary producers that contribute to oxygen production.

Question 19

Which of the following is a plausible effect of climate change on sockeye salmon populations?

Accepted Answer

Increased water flow and temperature may alter population sizes.

Question 20

Which of the following is a correct statement about the interaction of abiotic and biotic factors in an ecosystem?

Accepted Answer

Abiotic factors such as temperature and water flow can influence the distribution and abundance of living organisms.

Introduction to Ecology – Study Notes (Ch. 49, Biological Diversity)

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