Question 1

What is the main cause of carbon dioxide buildup in the atmosphere?

Accepted Answer

A)  burning fossil fuels 
B)  deforestation 
C)  droughts 
D)  flooding 
E)  respiration due to overpopulation 
A)  burning fossil fuels 
B)  deforestation 
C)  droughts 
D)  flooding 
E)  respiration due to overpopulation

Question 2

Which ecosystem has the lowest percentage of total net primary productivity?

Accepted Answer

A)  open ocean 
B)  savanna 
C)  swamp and march 
D)  temperate deciduous forests 
E)  tundra 
A)  open ocean 
B)  savanna 
C)  swamp and march 
D)  temperate deciduous forests 
E)  tundra

Question 3

How would ecological efficiency change if all humans became vegetarians?

Accepted Answer

Since energy is lost at each trophic lev

Question 4

Humans have disrupted the nitrogen cycle primarily by ____.

Accepted Answer

A)  irrigation 
B)  cutting down forests 
C)  using nitrogen-containing fertilizers 
D)  crop rotation 
E)  leaching 
A)  irrigation 
B)  cutting down forests 
C)  using nitrogen-containing fertilizers 
D)  crop rotation 
E)  leaching

Question 5

Lake ecosystems have many trophic levels.

Accepted Answer

A) True 
 B)False

Question 6

Large zooplankton decrease the ecosystem's main productivity when they are abundant.

Accepted Answer

A) True 
 B)False

Question 7

Respiration affects a compartment model by ____.

Accepted Answer

A)  moving carbon, but not oxygen, from the available organic compartment to the available inorganic component 
B)  moving oxygen, but not carbon, from the available organic compartment to the available inorganic component 
C)  moving both carbon and oxygen from the available organic compartment to the available inorganic component 
D)  moving both carbon and oxygen from the available inorganic compartment to the available organic component 
E)  moving carbon, but not oxygen, from the available inorganic compartment to the available organic component 
A)  moving carbon, but not oxygen, from the available organic compartment to the available inorganic component 
B)  moving oxygen, but not carbon, from the available organic compartment to the available inorganic component 
C)  moving both carbon and oxygen from the available organic compartment to the available inorganic component 
D)  moving both carbon and oxygen from the available inorganic compartment to the available organic component 
E)  moving carbon, but not oxygen, from the available inorganic compartment to the available organic component

Question 8

Trophic pyramids typically have a ____ base and a ____ top portion.

Accepted Answer

A)  narrow; narrow 
B)  narrow; wide 
C)  wide; narrow 
D)  wide; wide 
E)  flat; flat 
A)  narrow; narrow 
B)  narrow; wide 
C)  wide; narrow 
D)  wide; wide 
E)  flat; flat

Question 9

Which organisms would most likely have the highest tissue concentration of DDT?

Accepted Answer

A)  zooplankton 
B)  small herbivorous fish 
C)  large predatory fish 
D)  osprey 
E)  large herbivorous fish 
A)  zooplankton 
B)  small herbivorous fish 
C)  large predatory fish 
D)  osprey 
E)  large herbivorous fish

Question 10

Net primary productivity is a measure of the rate at which ____ accumulate energy, as well as the rate at which new ____ is added to a system.

Accepted Answer

A)  consumers; inorganic material 
B)  producers; inorganic material 
C)  carnivores; prey 
D)  producers; biomass 
E)  consumers; biomass 
A)  consumers; inorganic material 
B)  producers; inorganic material 
C)  carnivores; prey 
D)  producers; biomass 
E)  consumers; biomass

Exam 54: Ecosystems

What is the main cause of carbon dioxide buildup in the atmosphere?

Which ecosystem has the lowest percentage of total net primary productivity?

How would ecological efficiency change if all humans became vegetarians?

Humans have disrupted the nitrogen cycle primarily by ____.

Lake ecosystems have many trophic levels.

Large zooplankton decrease the ecosystem's main productivity when they are abundant.

Respiration affects a compartment model by ____.

Trophic pyramids typically have a ____ base and a ____ top portion.

Which organisms would most likely have the highest tissue concentration of DDT?

Net primary productivity is a measure of the rate at which ____ accumulate energy, as well as the rate at which new ____ is added to a system.

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Expression: From Dna to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technology: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Digestive Systems and Animal Nutrition

Regulating the Internal Environment: Osmoregulation, Excretion, and Thermoregulation

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Biodiversity and Conservation Biology

Animal Behavior

Filters

Trophic pyramids typically have a base and a top portion.

Net primary productivity is a measure of the rate at which accumulate energy, as well as the rate at which new is added to a system.