Question 1

Autotrophs that dwell in dark caves,in wells,or on the ocean floor often depend on which of the following biogeochemical processes?

Accepted Answer

A) Chemosynthesis. 
B) Photosynthesis. 
C) Nutrient leaching. 
D) Nitrogen fixing. 
A) Chemosynthesis. 
B) Photosynthesis. 
C) Nutrient leaching. 
D) Nitrogen fixing.

Question 2

From the perspective of energy,which of the following is the most efficient trophic level?

Accepted Answer

A) Primary producer. 
B) Primary consumer. 
C) Secondary consumer. 
D) Tertiary consumer. 
A) Primary producer. 
B) Primary consumer. 
C) Secondary consumer. 
D) Tertiary consumer.

Question 3

Since life arose on Earth,how many major extinctions have occurred?

Accepted Answer

A) One. 
B) Two. 
C) Six. 
D) Ten. 
A) One. 
B) Two. 
C) Six. 
D) Ten.

Question 4

Which is the break-even point between the production and consumption of organic material?

Accepted Answer

A) Net primary productivity. 
B) Compensation point. 
C) Net photosynthesis. 
D) Free air CO2 enrichment. 
A) Net primary productivity. 
B) Compensation point. 
C) Net photosynthesis. 
D) Free air CO2 enrichment.

Question 5

Habitat loss,pollution,resource exploitation,climate change,and introduction of non-native species are among the biggest threats to biodiversity.

Accepted Answer

A) True 
 B)False

Question 6

A black walnut (Juglans nigra)emits a chemical that may kill or inhibit the growth of other nearby shrubs or trees.However,the black walnut is unaffected by this interaction.This is an example of which symbiotic relationship?

Accepted Answer

A) Parasitism. 
B) Mutualism. 
C) Commensalism. 
D) Amensalism. 
A) Parasitism. 
B) Mutualism. 
C) Commensalism. 
D) Amensalism.

Question 7

Which is the proposition that no two species can occupy the same ecological niche?

Accepted Answer

A) Symbiosis. 
B) Competitive exclusion principle. 
C) Trophic pyramid theory. 
D) Ecological niche theory. 
A) Symbiosis. 
B) Competitive exclusion principle. 
C) Trophic pyramid theory. 
D) Ecological niche theory.

Question 8

A resilient species or ecosystem is one that can recover quickly from disturbance.

Accepted Answer

A) True 
 B)False

Question 9

Organisms that share the same feeding level (e.g.primary producers,primary consumers,secondary consumers,etc.)are said to be which of the following?

Accepted Answer

A) At the same food web. 
B) At the same niche order. 
C) At the same trophic level. 
D) At the same food pyramid. 
A) At the same food web. 
B) At the same niche order. 
C) At the same trophic level. 
D) At the same food pyramid.

Question 10

Describe the main abiotic ecosystem components.Give at least two regional examples of how these elements combine to form ecosystems.

Accepted Answer

Abiotic components of an ecosy

Question 11

Which is the study of the interrelationships between organisms and their environment?

Accepted Answer

A) Biology. 
B) Ecology. 
C) Pedology. 
D) Biogeography. 
A) Biology. 
B) Ecology. 
C) Pedology. 
D) Biogeography.

Question 12

Chlorophyll reflects predominately which wavelengths of visible light?

Accepted Answer

A) Red. 
B) Blue. 
C) Green. 
D) Indigo. 
A) Red. 
B) Blue. 
C) Green. 
D) Indigo.

Question 13

As chemical pesticides move through the trophic pyramid,they may be amplified at each higher level.Which is this process?

Accepted Answer

A) Biomagnification. 
B) Trophic cascading. 
C) Competitive exclusion. 
D) Pyramidal decay. 
A) Biomagnification. 
B) Trophic cascading. 
C) Competitive exclusion. 
D) Pyramidal decay.

Question 14

Consider a monocultural agriculture community and a community with high biodiversity.How does the vulnerability to disturbance compare between the two?

Accepted Answer

A) Monoculural community is less vulnerable than the diverse community. 
B) Monoculural community is more vulnerable than the diverse community. 
C) Monoculural community is equally vulnerable as the diverse community. 
A) Monoculural community is less vulnerable than the diverse community. 
B) Monoculural community is more vulnerable than the diverse community. 
C) Monoculural community is equally vulnerable as the diverse community.

Question 15

Which of the following best describes the spatial variability of net primary productivity?

Accepted Answer

A) At temperate and high latitudes,the rate of carbon fixing is constant. 
B) Productivity rates are constantly high throughout the year in the tropics. 
C) Net primary productivity is highest in the fall and winter in temperate and high latitude areas. 
D) Productivity rates in deserts are much greater than those of tropical regions. 
A) At temperate and high latitudes,the rate of carbon fixing is constant. 
B) Productivity rates are constantly high throughout the year in the tropics. 
C) Net primary productivity is highest in the fall and winter in temperate and high latitude areas. 
D) Productivity rates in deserts are much greater than those of tropical regions.

Question 16

Which is the net photosynthesis for an entire ecosystem?

Accepted Answer

A) Net primary productivity. 
B) Compensation point. 
C) Net photosynthesis. 
D) Free air CO2 enrichment. 
A) Net primary productivity. 
B) Compensation point. 
C) Net photosynthesis. 
D) Free air CO2 enrichment.

Question 17

The gaseous oxygen in Earth's atmosphere was produced as a by-product of which process?

Accepted Answer

A) Volcanic outgassing. 
B) Photochemical reactions breaking down ozone (O3)to form oxygen (O2). 
C) Photosynthesis. 
D) Decay of organic matter. 
A) Volcanic outgassing. 
B) Photochemical reactions breaking down ozone (O3)to form oxygen (O2). 
C) Photosynthesis. 
D) Decay of organic matter.

Question 18

A consumer,such as a bear,that eats both producers (plants)and consumers (animals)is which of the following?

Accepted Answer

A) Herbivore. 
B) Carnivore. 
C) Omnivore. 
D) Detritivore. 
A) Herbivore. 
B) Carnivore. 
C) Omnivore. 
D) Detritivore.

Question 19

Currently,approximately which percentage of cultivated acreage in Canada and the United States is planted for animal consumption?

Accepted Answer

A) 15%. 
B) 30%. 
C) 50%. 
D) 65%. 
A) 15%. 
B) 30%. 
C) 50%. 
D) 65%.

Question 20

Lichen are made up of algae and fungi living together.In this relationship,the alga is the producer and food source for the fungus and the fungus provides structure and physical support for the alga.This is an example of which symbiotic relationship?

Accepted Answer

A) Parasitism. 
B) Mutualism. 
C) Commensalism. 
D) Amensalism. 
A) Parasitism. 
B) Mutualism. 
C) Commensalism. 
D) Amensalism.

Autotrophs that dwell in dark caves,in wells,or on the ocean floor often depend on which of the following biogeochemical processes?

From the perspective of energy,which of the following is the most efficient trophic level?

Since life arose on Earth,how many major extinctions have occurred?

Which is the break-even point between the production and consumption of organic material?

Habitat loss,pollution,resource exploitation,climate change,and introduction of non-native species are among the biggest threats to biodiversity.

A black walnut (Juglans nigra)emits a chemical that may kill or inhibit the growth of other nearby shrubs or trees.However,the black walnut is unaffected by this interaction.This is an example of which symbiotic relationship?

Which is the proposition that no two species can occupy the same ecological niche?

A resilient species or ecosystem is one that can recover quickly from disturbance.

Organisms that share the same feeding level (e.g.primary producers,primary consumers,secondary consumers,etc.)are said to be which of the following?

Describe the main abiotic ecosystem components.Give at least two regional examples of how these elements combine to form ecosystems.

Which is the study of the interrelationships between organisms and their environment?

Chlorophyll reflects predominately which wavelengths of visible light?

As chemical pesticides move through the trophic pyramid,they may be amplified at each higher level.Which is this process?

Consider a monocultural agriculture community and a community with high biodiversity.How does the vulnerability to disturbance compare between the two?

Which of the following best describes the spatial variability of net primary productivity?

Which is the net photosynthesis for an entire ecosystem?

The gaseous oxygen in Earth's atmosphere was produced as a by-product of which process?

A consumer,such as a bear,that eats both producers (plants)and consumers (animals)is which of the following?

Currently,approximately which percentage of cultivated acreage in Canada and the United States is planted for animal consumption?

Lichen are made up of algae and fungi living together.In this relationship,the alga is the producer and food source for the fungus and the fungus provides structure and physical support for the alga.This is an example of which symbiotic relationship?

Essentials of Geography

Solar Energy to Earth and the Seasons

Earths Modern Atmosphere

Atmosphere and Surface Energy Balances

Global Temperatures

Atmospheric and Oceanic Circulations

Water and Atmospheric Moisture

Weather

Water Resources

Global Climate Systems

Climate Change

The Dynamic Planet

Tectonics, earthquakes, and Volcanism

Weathering, karst Landscapes, and Mass Movement

River Systems

Oceans, coastal Processes, and Wind Processes

Glacial and Periglacial Landscapes

The Geography of Soils

Terrestrial Biomes

Filters

Exam 19: Ecosystem Essentials

Autotrophs that dwell in dark caves,in wells,or on the ocean floor often depend on which of the following biogeochemical processes?

From the perspective of energy,which of the following is the most efficient trophic level?

Since life arose on Earth,how many major extinctions have occurred?

Which is the break-even point between the production and consumption of organic material?

Habitat loss,pollution,resource exploitation,climate change,and introduction of non-native species are among the biggest threats to biodiversity.

A black walnut (Juglans nigra)emits a chemical that may kill or inhibit the growth of other nearby shrubs or trees.However,the black walnut is unaffected by this interaction.This is an example of which symbiotic relationship?

Which is the proposition that no two species can occupy the same ecological niche?

A resilient species or ecosystem is one that can recover quickly from disturbance.

Organisms that share the same feeding level (e.g.primary producers,primary consumers,secondary consumers,etc.)are said to be which of the following?

Describe the main abiotic ecosystem components.Give at least two regional examples of how these elements combine to form ecosystems.

Which is the study of the interrelationships between organisms and their environment?

Chlorophyll reflects predominately which wavelengths of visible light?

As chemical pesticides move through the trophic pyramid,they may be amplified at each higher level.Which is this process?

Consider a monocultural agriculture community and a community with high biodiversity.How does the vulnerability to disturbance compare between the two?

Which of the following best describes the spatial variability of net primary productivity?

Which is the net photosynthesis for an entire ecosystem?

The gaseous oxygen in Earth's atmosphere was produced as a by-product of which process?

A consumer,such as a bear,that eats both producers (plants)and consumers (animals)is which of the following?

Currently,approximately which percentage of cultivated acreage in Canada and the United States is planted for animal consumption?

Lichen are made up of algae and fungi living together.In this relationship,the alga is the producer and food source for the fungus and the fungus provides structure and physical support for the alga.This is an example of which symbiotic relationship?

Essentials of Geography

Solar Energy to Earth and the Seasons

Earths Modern Atmosphere

Atmosphere and Surface Energy Balances

Global Temperatures

Atmospheric and Oceanic Circulations

Water and Atmospheric Moisture

Weather

Water Resources

Global Climate Systems

Climate Change

The Dynamic Planet

Tectonics, earthquakes, and Volcanism

Weathering, karst Landscapes, and Mass Movement

River Systems

Oceans, coastal Processes, and Wind Processes

Glacial and Periglacial Landscapes

The Geography of Soils

Terrestrial Biomes

Filters