Question 1

Why are epiphytes considered commensal?

Accepted Answer

A) They feed on the tree they are living on. 
B) The tree is not harmed by the epiphytes. 
C) The tree benefits from the epiphytes that live on it. 
D) Both the tree and the epiphytes feed on each other. 
A) They feed on the tree they are living on. 
B) The tree is not harmed by the epiphytes. 
C) The tree benefits from the epiphytes that live on it. 
D) Both the tree and the epiphytes feed on each other.

Question 2

A louse is which of the following?

Accepted Answer

A) a parasite 
B) a predator 
C) a consumer 
D) a & c 
A) a parasite 
B) a predator 
C) a consumer 
D) a & c

Question 3

List and briefly explain one way each how human activities are impacting biogeochemical cycles of carbon, nitrogen, phosphorous and water.

Accepted Answer

Human activities are increasingly distur

Question 4

Which of the following accurately represents a sequential portion of the nitrogen cycle?

Accepted Answer

A) N2 in the atmosphere -- ammonification -- nitrification -- plants 
B) N2  in the atmosphere - nitrification --plants 
C) dead organic material -- ammonification -- nitrification -- plants 
D) plant proteins -- animal proteins -- nitrification -- N2 in the atmosphere 
A) N2 in the atmosphere -- ammonification -- nitrification -- plants 
B) N2  in the atmosphere - nitrification --plants 
C) dead organic material -- ammonification -- nitrification -- plants 
D) plant proteins -- animal proteins -- nitrification -- N2 in the atmosphere

Question 5

Interspecific competition is competition that occurs between individuals of different species.

Accepted Answer

A) True 
 B)False

Question 6

What is stated by the First Law of Thermodynamics?

Accepted Answer

A) energy can be created or destroyed by physical processes. 
B) entropy always increases. 
C) energy cannot be created or destroyed. 
D) the organization of the universe is steadily increasing. 
A) energy can be created or destroyed by physical processes. 
B) entropy always increases. 
C) energy cannot be created or destroyed. 
D) the organization of the universe is steadily increasing.

Question 7

What type of chemical energy is stored in a plant?

Accepted Answer

A) kinetic 
B) nuclear 
C) solar 
D) potential 
A) kinetic 
B) nuclear 
C) solar 
D) potential

Question 8

What is each level or "link" in a food chain or a food web called?

Accepted Answer

A) a trophic level. 
B) a consumer. 
C) an energy flow unit. 
D) a producer. 
A) a trophic level. 
B) a consumer. 
C) an energy flow unit. 
D) a producer.

Question 9

Which of the following processes is not involved in the hydrologic cycle?

Accepted Answer

A) transpiration 
B) precipitation 
C) evaporation 
D) combustion 
A) transpiration 
B) precipitation 
C) evaporation 
D) combustion

Question 10

Which of the following accurately represents a carbon source and the process that releases carbon from that source?

Accepted Answer

A) fossil fuels, respiration 
B) animals, photosynthesis 
C) plants, cellular respiration 
D) bicarbonate, combustion 
A) fossil fuels, respiration 
B) animals, photosynthesis 
C) plants, cellular respiration 
D) bicarbonate, combustion

Question 11

Keystone species:

Accepted Answer

A) are only found in aquatic habitats. 
B) are always found at the top of the food chain. 
C) are vital to the soil balance of an entire ecosystem. 
D) are usually not the most abundant species in the ecosystem. 
A) are only found in aquatic habitats. 
B) are always found at the top of the food chain. 
C) are vital to the soil balance of an entire ecosystem. 
D) are usually not the most abundant species in the ecosystem.

Why are epiphytes considered commensal?

A louse is which of the following?

List and briefly explain one way each how human activities are impacting biogeochemical cycles of carbon, nitrogen, phosphorous and water.

Which of the following accurately represents a sequential portion of the nitrogen cycle?

Interspecific competition is competition that occurs between individuals of different species.

What is stated by the First Law of Thermodynamics?

What type of chemical energy is stored in a plant?

What is each level or "link" in a food chain or a food web called?

Which of the following processes is not involved in the hydrologic cycle?

Which of the following accurately represents a carbon source and the process that releases carbon from that source?

Keystone species:

The Environmental Challenges We Face

Sustainability and Human Values

Environmental History, Politics, and Economics

Risk Analysis and Environmental Health Hazards

Ecosystems and Evolution

Human Population Change and the Environment

Air and Air Pollution

Global Atmospheric Changes

Freshwater Resources and Water Pollution

The Ocean and Fisheries

Mineral and Soil Resources

Land Resources

Agriculture and Food Resources

Biodiversity and Conservation

Solid and Hazardous Waste

Nonrenewable Energy Resources

Renewable Energy Resources

Filters

Exam 5: How Ecosystems Work

Why are epiphytes considered commensal?

A louse is which of the following?

List and briefly explain one way each how human activities are impacting biogeochemical cycles of carbon, nitrogen, phosphorous and water.

Which of the following accurately represents a sequential portion of the nitrogen cycle?

Interspecific competition is competition that occurs between individuals of different species.

What is stated by the First Law of Thermodynamics?

What type of chemical energy is stored in a plant?

What is each level or "link" in a food chain or a food web called?

Which of the following processes is not involved in the hydrologic cycle?

Which of the following accurately represents a carbon source and the process that releases carbon from that source?

Keystone species:

The Environmental Challenges We Face

Sustainability and Human Values

Environmental History, Politics, and Economics

Risk Analysis and Environmental Health Hazards

Ecosystems and Evolution

Human Population Change and the Environment

Air and Air Pollution

Global Atmospheric Changes

Freshwater Resources and Water Pollution

The Ocean and Fisheries

Mineral and Soil Resources

Land Resources

Agriculture and Food Resources

Biodiversity and Conservation

Solid and Hazardous Waste

Nonrenewable Energy Resources

Renewable Energy Resources

Filters