Question 1

Ecological efficiency, described as the percentage of energy at one trophic level that ends up in tissue in the next level, is approximately ____ to ____%.

Accepted Answer

A) 1; 5 
B) 1; 20 
C) 5; 30 
D) 10; 40 
E) 50; 60 
A) 1; 5 
B) 1; 20 
C) 5; 30 
D) 10; 40 
E) 50; 60

Question 2

Soils that hold the most carbon occur in ____.

Accepted Answer

A) tropical rain forests 
B) temperate deciduous forests 
C) grasslands and in savannas 
D) the arctic and in peatbogs 
E) chaparral and in deserts 
A) tropical rain forests 
B) temperate deciduous forests 
C) grasslands and in savannas 
D) the arctic and in peatbogs 
E) chaparral and in deserts

Question 3

Four of the five answers listed below are heterotrophic. Select the exception.

Accepted Answer

A) consumers 
B) carnivores 
C) herbivores 
D) parasites 
E) producers 
A) consumers 
B) carnivores 
C) herbivores 
D) parasites 
E) producers

Question 4

​Four of the five answers listed below are nonbiological reservoirs in biogeochemical cycles. Select the exception.

Accepted Answer

A) ​aquifers 
B) ​oceans 
C) ​atmosphere 
D) ​guano 
E) ​limestone 
A) ​aquifers 
B) ​oceans 
C) ​atmosphere 
D) ​guano 
E) ​limestone

Question 5

The greatest concentration of nitrogen on the planet Earth is found in ____.

Accepted Answer

A) living organisms 
B) the atmosphere 
C) soil minerals 
D) fossil fuels 
E) the oceans 
A) living organisms 
B) the atmosphere 
C) soil minerals 
D) fossil fuels 
E) the oceans

Question 6

What is the main source of increasing greenhouse gases?

Accepted Answer

A) increased cellular respiration 
B) increased use of fossil fuels 
C) increased diffusion from the oceans 
D) increased volcanic activity 
E) increased animal life on Earth 
A) increased cellular respiration 
B) increased use of fossil fuels 
C) increased diffusion from the oceans 
D) increased volcanic activity 
E) increased animal life on Earth

Question 7

Four of the five answers are consumers in an ecosystem. Select the exception.

Accepted Answer

A) wolves 
B) sparrows 
C) earthworms 
D) fungi 
E) grasses 
A) wolves 
B) sparrows 
C) earthworms 
D) fungi 
E) grasses

Question 8

How does phosphorus enter the biological portion of the cycle?

Accepted Answer

A) Land plants take up dissolved phosphate from soil water. 
B) Bacteria fix phosphate from the atmosphere. 
C) Consumers eat phosphate-containing soil. 
D) Bacteria fix phosphate from water. 
E) Erosion of rocks moves phosphate into water, which consumers drink. 
A) Land plants take up dissolved phosphate from soil water. 
B) Bacteria fix phosphate from the atmosphere. 
C) Consumers eat phosphate-containing soil. 
D) Bacteria fix phosphate from water. 
E) Erosion of rocks moves phosphate into water, which consumers drink.

Question 9

Nitrogen is released into the atmosphere by ____.

Accepted Answer

A) nitrogen fixation 
B) denitrification 
C) nitrification 
D) ammonification 
E) decomposition 
A) nitrogen fixation 
B) denitrification 
C) nitrification 
D) ammonification 
E) decomposition

Question 10

By the process called ____, an organism's tissues store a pollutant taken up from the environment, causing the amount in the body to increase over time.

Accepted Answer

A) pollutant fixation 
B) biological magnification 
C) chemical buildup 
D) acidification 
E) bioaccumulation 
A) pollutant fixation 
B) biological magnification 
C) chemical buildup 
D) acidification 
E) bioaccumulation

Question 11

Producers are present at which trophic level?

Accepted Answer

A) first 
B) second 
C) third 
D) fourth or higher 
E) the level varies with different ecosystems 
A) first 
B) second 
C) third 
D) fourth or higher 
E) the level varies with different ecosystems

Question 12

Four of the five answers listed below pass through the atmosphere during their cycling. Select the exception.

Accepted Answer

A) carbon 
B) oxygen 
C) nitrogen 
D) phosphorus 
E) water 
A) carbon 
B) oxygen 
C) nitrogen 
D) phosphorus 
E) water

Exam 42: Ecosystems

Ecological efficiency, described as the percentage of energy at one trophic level that ends up in tissue in the next level, is approximately ____ to ____%.

Soils that hold the most carbon occur in ____.

Four of the five answers listed below are heterotrophic. Select the exception.

​Four of the five answers listed below are nonbiological reservoirs in biogeochemical cycles. Select the exception.

The greatest concentration of nitrogen on the planet Earth is found in ____.

What is the main source of increasing greenhouse gases?

Four of the five answers are consumers in an ecosystem. Select the exception.

How does phosphorus enter the biological portion of the cycle?

Nitrogen is released into the atmosphere by ____.

By the process called ____, an organism's tissues store a pollutant taken up from the environment, causing the amount in the body to increase over time.

Producers are present at which trophic level?

Four of the five answers listed below pass through the atmosphere during their cycling. Select the exception.

The Science of Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure

Ground Rules of Metabolism

Where It Starts-Photosynthesis

Releasing Chemical Energy

DNA Structure and Function

From DNA to Protein

Control of Gene Expression

How Cells Reproduce

Meiosis and Sexual Reproduction

Patterns in Inherited Traits

Human Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Lifes Origin and Early Evolution

Viruses, Bacteria, and Archaea

The Protists

Plant Evolution

Fungi

Animals I: Major Invertebrate Groups

Animals Ii: the Chordates

Plant Tissues

Plant Nutrition and Transport

Plant Reproduction and Development

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Human Nutrition

Maintaining the Internal Environment

Reproduction and Development

Animal Behavior

Population Ecology

Community Ecology

The Biosphere

Human Effects on the Biosphere

Filters

Ecological efficiency, described as the percentage of energy at one trophic level that ends up in tissue in the next level, is approximately to %.

Four of the five answers listed below are nonbiological reservoirs in biogeochemical cycles. Select the exception.