Question 1

Which step of the nitrogen cycle is not performed by most bacteria?

Accepted Answer

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

Question 2

Which of the following are likely detritivores?

Accepted Answer

A)  earthworms 
B)  deer 
C)  grasshoppers 
D)  spiders 
E)  lions 
A)  earthworms 
B)  deer 
C)  grasshoppers 
D)  spiders 
E)  lions A

Question 3

MATCHING
Match the component of the nitrogen cycle with its description.
a.assimilation
c.nitrification
b.denitrification
d.nitrogen fixation
-converts N2 to NH3

Accepted Answer

D

Question 4

Bacteria are most essential in the cycling of:

Accepted Answer

A)  carbon. 
B)  water. 
C)  phosphorus. 
D)  nitrogen. 
E)  energy. 
A)  carbon. 
B)  water. 
C)  phosphorus. 
D)  nitrogen. 
E)  energy.

Question 5

MATCHING
Match the component of the nitrogen cycle with its description.
a.assimilation
c.nitrification
b.denitrification
d.nitrogen fixation
-the principle enzyme is nitrogenase

Accepted Answer

The answer of MATCHING
Match the component of the nitrogen cycle...

Question 6

MATCHING
Match the component of the nitrogen cycle with its description.
a.assimilation
c.nitrification
b.denitrification
d.nitrogen fixation
-the process by which animals convert plant nitrogen compounds into animal nitrogen compounds

Accepted Answer

The answer of MATCHING
Match the component of the nitrogen cycle...

Question 7

Figure 55-2
Use the figure to answer the corresponding question(s).  
-In Figure 55-2, the gull has the highest concentration of DDT because it is:

Accepted Answer

A)  a more complex organism. 
B)  an older organism. 
C)  at the bottom of the food chain. 
D)  at the top of the food chain. 
E)  homoeothermic (warm-blooded). 
A)  a more complex organism. 
B)  an older organism. 
C)  at the bottom of the food chain. 
D)  at the top of the food chain. 
E)  homoeothermic (warm-blooded).

Question 8

To date, humans have interfered with all of the biogeochemical cycles on Earth, but this interference has been of the greatest magnitude, in terms of human-induced changes in climate, in the:

Accepted Answer

A)  hydrologic cycle. 
B)  nitrogen cycle. 
C)  carbon cycle. 
D)  sulfur cycle. 
E)  phosphorus cycle. 
A)  hydrologic cycle. 
B)  nitrogen cycle. 
C)  carbon cycle. 
D)  sulfur cycle. 
E)  phosphorus cycle.

Question 9

In the African savanna, fire helps maintain the dominant vegetation.
____________________

Accepted Answer

A) True 
 B)False

Question 10

Identify and describe three beneficial impacts of fire on certain ecosystems.

Accepted Answer

Fire frees the minerals locked in organi

Question 11

Compare and contrast the conceptual foundation and application of two different types of ecological pyramids.

Accepted Answer

Ecological pyramids graphically represen

Question 12

In an ecosystem, which measure of energy is necessarily the largest in amount or rate?

Accepted Answer

A)  net primary productivity 
B)  gross primary productivity 
C)  plant respiration 
D)  animal respiration 
E)  plant and animal respiration combined 
A)  net primary productivity 
B)  gross primary productivity 
C)  plant respiration 
D)  animal respiration 
E)  plant and animal respiration combined

Question 13

MATCHING
Match the component of the nitrogen cycle with its description.
a.assimilation
c.nitrification
b.denitrification
d.nitrogen fixation
-returns gaseous nitrogen to the atmosphere

Accepted Answer

The answer of MATCHING
Match the component of the nitrogen cycle...

Question 14

This nutrient cycle does not have a gaseous phase:

Accepted Answer

A)  hydrologic cycle. 
B)  nitrogen cycle. 
C)  carbon cycle. 
D)  sulfur cycle. 
E)  phosphorus cycle. 
A)  hydrologic cycle. 
B)  nitrogen cycle. 
C)  carbon cycle. 
D)  sulfur cycle. 
E)  phosphorus cycle.

Question 15

The most abundant gas in the atmosphere is oxygen.
____________________

Accepted Answer

A) True 
 B)False

Question 16

What key factor limits the number of trophic levels in an ecosystem?

Accepted Answer

A)  maximum solar radiation 
B)  energy loss 
C)  herbivore size 
D)  predator size 
E)  climate 
A)  maximum solar radiation 
B)  energy loss 
C)  herbivore size 
D)  predator size 
E)  climate

Question 17

Figure 55-1
Use the figure to answer the corresponding question(s).  
-Figure 55-1 represents:

Accepted Answer

A)  a fairly simple food web. 
B)  a fairly simple food chain. 
C)  a pyramid of biomass. 
D)  a pyramid of energy. 
E)  a pyramid of numbers. 
A)  a fairly simple food web. 
B)  a fairly simple food chain. 
C)  a pyramid of biomass. 
D)  a pyramid of energy. 
E)  a pyramid of numbers.

Question 18

In a food chain, primary consumers occupy the first trophic level.
____________________

Accepted Answer

A) True 
 B)False

Question 19

Figure 55-2
Use the figure to answer the corresponding question(s).  
-Figure 55-2 is a good illustration of:

Accepted Answer

A)  bioconcentration. 
B)  biological magnification. 
C)  persistence. 
D)  narrow-spectrum botanicals. 
E)  the pesticide treadmill. 
A)  bioconcentration. 
B)  biological magnification. 
C)  persistence. 
D)  narrow-spectrum botanicals. 
E)  the pesticide treadmill.

Question 20

Wind drives the ocean's currents and the __________ drives wind.

Accepted Answer

A)  Coriolis effect 
B)  precipitation 
C)  biogeochemical cycles 
D)  sun 
E)  evaporation. 
A)  Coriolis effect 
B)  precipitation 
C)  biogeochemical cycles 
D)  sun 
E)  evaporation.

Exam 55: Ecosystems and the Biosphere

Which step of the nitrogen cycle is not performed by most bacteria?

Which of the following are likely detritivores?

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -converts N2 to NH3

Bacteria are most essential in the cycling of:

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -the principle enzyme is nitrogenase

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -the process by which animals convert plant nitrogen compounds into animal nitrogen compounds

Figure 55-2 Use the figure to answer the corresponding question(s). -In Figure 55-2, the gull has the highest concentration of DDT because it is:

To date, humans have interfered with all of the biogeochemical cycles on Earth, but this interference has been of the greatest magnitude, in terms of human-induced changes in climate, in the:

In the African savanna, fire helps maintain the dominant vegetation. ____________________

Identify and describe three beneficial impacts of fire on certain ecosystems.

Compare and contrast the conceptual foundation and application of two different types of ecological pyramids.

In an ecosystem, which measure of energy is necessarily the largest in amount or rate?

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -returns gaseous nitrogen to the atmosphere

This nutrient cycle does not have a gaseous phase:

The most abundant gas in the atmosphere is oxygen. ____________________

What key factor limits the number of trophic levels in an ecosystem?

Figure 55-1 Use the figure to answer the corresponding question(s). -Figure 55-1 represents:

In a food chain, primary consumers occupy the first trophic level. ____________________

Figure 55-2 Use the figure to answer the corresponding question(s). -Figure 55-2 is a good illustration of:

Wind drives the ocean's currents and the __________ drives wind.

A View of Life

Atoms and Molecules: the Chemical Basis of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Dna: the Carrier of Genetic Information

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

Filters

MATCHING Match the component of the nitrogen cycle with its description. a.assimilation c.nitrification b.denitrification d.nitrogen fixation -converts N₂ to NH₃