Question 1

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 C

Question 2

Match between columns
                        Premises: detritivores and decomposers

Accepted Answer

The Answer of C and B and E and D is...

Question 3

Biogeochemical cycles describe ____. ​

Accepted Answer

A) the constant recycling of nutrients between biotic and abiotic components of ecosystems 
B) pathways by which energy and nutrients move through biotic components of ecosystems 
C) all available nutrients in an ecosystem 
D) a series of mathematical equations that define an ecosystem's most important relationships 
E) the input of solar energy into a closed ecosystem 
A) the constant recycling of nutrients between biotic and abiotic components of ecosystems 
B) pathways by which energy and nutrients move through biotic components of ecosystems 
C) all available nutrients in an ecosystem 
D) a series of mathematical equations that define an ecosystem's most important relationships 
E) the input of solar energy into a closed ecosystem A

Question 4

An available nutrient molecule ____. ​

Accepted Answer

A) exists in living or dead tissues 
B) cannot be assimilated by organisms 
C) can be assimilated by organisms 
D) exists in rocks and soil 
E) exists as an ion 
A) exists in living or dead tissues 
B) cannot be assimilated by organisms 
C) can be assimilated by organisms 
D) exists in rocks and soil 
E) exists as an ion

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

A small decrease in seawater pH was shown to have a significant effect on ____. ​

Accepted Answer

A) climate change 
B) the oceanic sink for carbon dioxide 
C) gene expression in sea urchin larvae 
D) genes expression in zooplankton 
E) carbon dioxide accumulation in the ocean 
A) climate change 
B) the oceanic sink for carbon dioxide 
C) gene expression in sea urchin larvae 
D) genes expression in zooplankton 
E) carbon dioxide accumulation in the ocean

Question 7

What is the ratio of the energy content of food consumed to the energy content of food available? ​

Accepted Answer

A) ecological efficiency 
B) harvesting efficiency 
C) production efficiency 
D) assimilation efficiency 
E) net primary productivity 
A) ecological efficiency 
B) harvesting efficiency 
C) production efficiency 
D) assimilation efficiency 
E) net primary productivity

Question 8

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 9

Experiments in which nitrogen supplementation increased the biomass of both plants and herbivores show ____. ​

Accepted Answer

A) bottom-up control 
B) top-down control 
C) indirect control 
D) inverted cascades 
E) nutrient cycling 
A) bottom-up control 
B) top-down control 
C) indirect control 
D) inverted cascades 
E) nutrient cycling

Question 10

Fossil fuels are the result of buried organisms where low oxygen levels existed.

Accepted Answer

A) True 
 B)False

Question 11

In aquatic ecosystems, CO2 reacts with water to form ____. ​

Accepted Answer

A) HCO 
B) HNO3 
C) CaCO3 
D) CO 
E) H2CO3 
A) HCO 
B) HNO3 
C) CaCO3 
D) CO 
E) H2CO3

Question 12

Anthropogenic events ____. ​

Accepted Answer

A) refer to the carbon cycle 
B) refer to all nutrient cycles 
C) originate with human activities 
D) refer to absorption of the sun's energy in the atmosphere 
E) are caused by human overpopulation 
A) refer to the carbon cycle 
B) refer to all nutrient cycles 
C) originate with human activities 
D) refer to absorption of the sun's energy in the atmosphere 
E) are caused by human overpopulation

Question 13

The largest reservoir of water is the ____. ​

Accepted Answer

A) oceans 
B) polar ice and glaciers 
C) groundwater 
D) lakes and rivers 
E) atmosphere 
A) oceans 
B) polar ice and glaciers 
C) groundwater 
D) lakes and rivers 
E) atmosphere

Question 14

A ____ restricts productivity. ​

Accepted Answer

A) primary producer 
B) secondary producer 
C) photosynthesizer 
D) detritivore 
E) limiting nutrient 
A) primary producer 
B) secondary producer 
C) photosynthesizer 
D) detritivore 
E) limiting nutrient

Question 15

Endothermic animals use the majority of their energy to _____. ​

Accepted Answer

A) digest 
B) grow 
C) move 
D) reproduce 
E) stay warm 
A) digest 
B) grow 
C) move 
D) reproduce 
E) stay warm

Question 16

Oceans and the tropical rain forests contribute equally to global productivity.

Accepted Answer

A) True 
 B)False

Question 17

Scientists estimate that carbon dioxide in the atmosphere has increased by 35% in the last 150 years.

Accepted Answer

A) True 
 B)False

Question 18

Which ecosystem covers a large percentage of Earth's surface and, despite having low productivity, contributes a high percentage of total net primary productivity? ​

Accepted Answer

A) open ocean 
B) extreme desert, rock, sand, ice 
C) desert and thornwoods 
D) tropical deciduous forest 
E) temperate rainforest 
A) open ocean 
B) extreme desert, rock, sand, ice 
C) desert and thornwoods 
D) tropical deciduous forest 
E) temperate rainforest

Question 19

The analysis of energy flow in an aquatic ecosystem in Silver Springs, Florida revealed that ____. ​

Accepted Answer

A) energy flows are difficult to measure 
B) most of the sun's energy is harvested 
C) only a little energy is transferred from one trophic level to the next 
D) the energy flow in carnivores is equal to that of producers 
E) trophic energy losses are not significant 
A) energy flows are difficult to measure 
B) most of the sun's energy is harvested 
C) only a little energy is transferred from one trophic level to the next 
D) the energy flow in carnivores is equal to that of producers 
E) trophic energy losses are not significant

Question 20

Greenhouse gases ____, which is directed back toward Earth, maintaining the temperature of the atmosphere. ​

Accepted Answer

A) emit heat energy 
B) absorb heat energy 
C) emit carbon dioxide 
D) absorb solar energy 
E) absorb carbon dioxide 
A) emit heat energy 
B) absorb heat energy 
C) emit carbon dioxide 
D) absorb solar energy 
E) absorb carbon dioxide

Exam 54: Ecosystems

Humans have disrupted the nitrogen cycle primarily by ____. ​

Biogeochemical cycles describe ____. ​

An available nutrient molecule ____. ​

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

A small decrease in seawater pH was shown to have a significant effect on ____. ​

What is the ratio of the energy content of food consumed to the energy content of food available? ​

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

Experiments in which nitrogen supplementation increased the biomass of both plants and herbivores show ____. ​

Fossil fuels are the result of buried organisms where low oxygen levels existed.

In aquatic ecosystems, CO2 reacts with water to form ____. ​

Anthropogenic events ____. ​

The largest reservoir of water is the ____. ​

A ____ restricts productivity. ​

Endothermic animals use the majority of their energy to _____. ​

Oceans and the tropical rain forests contribute equally to global productivity.

Scientists estimate that carbon dioxide in the atmosphere has increased by 35% in the last 150 years.

Which ecosystem covers a large percentage of Earth's surface and, despite having low productivity, contributes a high percentage of total net primary productivity? ​

The analysis of energy flow in an aquatic ecosystem in Silver Springs, Florida revealed that ____. ​

Greenhouse gases ____, which is directed back toward Earth, maintaining the temperature of the atmosphere. ​

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

From DNA to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technologies: 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

Animal Nutrition

Regulating the Internal Environment

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Biodiversity and Conservation Biology

Animal Behavior

Filters

Humans have disrupted the nitrogen cycle primarily by ____.

Biogeochemical cycles describe ____.

An available nutrient molecule ____.

A small decrease in seawater pH was shown to have a significant effect on ____.

What is the ratio of the energy content of food consumed to the energy content of food available?

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

Experiments in which nitrogen supplementation increased the biomass of both plants and herbivores show ____.

In aquatic ecosystems, CO₂ reacts with water to form ____.

Anthropogenic events ____.

The largest reservoir of water is the ____.

A ____ restricts productivity.

Endothermic animals use the majority of their energy to _____.

Which ecosystem covers a large percentage of Earth's surface and, despite having low productivity, contributes a high percentage of total net primary productivity?

The analysis of energy flow in an aquatic ecosystem in Silver Springs, Florida revealed that ____.

Greenhouse gases ____, which is directed back toward Earth, maintaining the temperature of the atmosphere.