Question 1

Lake turnover occurs during the summer.

Accepted Answer

A) True 
 B)False

Question 2

Respiration involves

Accepted Answer

A) the use of heat energy to react carbon dioxide with water to produce water and oxygen. 
B) a chemical reaction between oxygen and carbohydrates that produces heat,carbon dioxide,and water. 
C) the use of light energy to react carbon dioxide with water to produce carbohydrates and oxygen. 
D) the use of light energy to react carbon dioxide with oxygen to produce water and oxygen. 
E) a chemical reaction between carbon dioxide and carbohydrates that produces light and water. 
A) the use of heat energy to react carbon dioxide with water to produce water and oxygen. 
B) a chemical reaction between oxygen and carbohydrates that produces heat,carbon dioxide,and water. 
C) the use of light energy to react carbon dioxide with water to produce carbohydrates and oxygen. 
D) the use of light energy to react carbon dioxide with oxygen to produce water and oxygen. 
E) a chemical reaction between carbon dioxide and carbohydrates that produces light and water.

Question 3

Which of the following expresses the correct relationship?

Accepted Answer

A) chloroplasts are chlorophyll. 
B) chlorophyll is in chloroplasts 
C) stomata control guard cells. 
D) chloroplasts control evaporation. 
E) organelles are in veins. 
A) chloroplasts are chlorophyll. 
B) chlorophyll is in chloroplasts 
C) stomata control guard cells. 
D) chloroplasts control evaporation. 
E) organelles are in veins.

Question 4

Energy flows through an ecosystem along a circuit called the

Accepted Answer

A) food web. 
B) niche order. 
C) trophic place. 
D) food chain. 
E) habitat. 
A) food web. 
B) niche order. 
C) trophic place. 
D) food chain. 
E) habitat.

Question 5

Draw a diagram of a food web and label producers,consumers,and decomposers.

Accepted Answer

Sure, I can help with that. A food web i

Question 6

In spite of improvements in pollution control,there is still a need for concern over the health of the Great Lakes ecosystem because of biological magnification.

Accepted Answer

A) True 
 B)False

Question 7

The study of the spatial aspects of ecology and the distribution of plants and animals is called

Accepted Answer

A) biology. 
B) ecology. 
C) geoarchaeology. 
D) biogeography. 
E) geobiology 
A) biology. 
B) ecology. 
C) geoarchaeology. 
D) biogeography. 
E) geobiology

Question 8

A similar progression of plant-community life zones occurs with increased altitude and latitude.

Accepted Answer

A) True 
 B)False

Question 9

Why do pollutants tend to concentrate at the higher ends of food chains?

Accepted Answer

Pollutants tend to concentrate at the hi

Question 10

Researchers have determined that weak (secondary)interactions in complex food webs are of little or no importance for the health of an ecosystem.

Accepted Answer

A) True 
 B)False

Question 11

What are important aspects of Humboldt's life-zone concept?

Accepted Answer

Humboldt's life-zone concept is an impor

Question 12

Primary productivity refers to ________ and is greatest in ________.

Accepted Answer

A) the number of herbivores per acre of land tropical savannas 
B) the number of carnivores per acre of land tropical savannas 
C) the number of herbivores per acre of land tropical rain forests 
D) the rate at which plant growth occurs tropical rain forests 
E) the rate at which plant growth occurs midlatitude deciduous forests 
A) the number of herbivores per acre of land tropical savannas 
B) the number of carnivores per acre of land tropical savannas 
C) the number of herbivores per acre of land tropical rain forests 
D) the rate at which plant growth occurs tropical rain forests 
E) the rate at which plant growth occurs midlatitude deciduous forests

Question 13

As climate change progresses,species distributions

Accepted Answer

A) in the northern hemisphere,will shift northward and to higher elevations pressuring existing species and leading to extinctions. 
B) will contract as plants and animals will have to adapt to new climatic conditions. 
C) will stay the same because climate does not determine their locations. 
D) in the northern hemisphere will shift southward as species adjust to the warmer climate. 
E) will face decreased competition as the warmer temperatures mean greater resource availability for plants and animals. 
A) in the northern hemisphere,will shift northward and to higher elevations pressuring existing species and leading to extinctions. 
B) will contract as plants and animals will have to adapt to new climatic conditions. 
C) will stay the same because climate does not determine their locations. 
D) in the northern hemisphere will shift southward as species adjust to the warmer climate. 
E) will face decreased competition as the warmer temperatures mean greater resource availability for plants and animals.

Question 14

Most ecosystems are relatively uniform,with few,if any,patches of former landscapes.

Accepted Answer

A) True 
 B)False

Question 15

Near the subtropical high pressure centers,net primary productivity is generally limited by

Accepted Answer

A) sunlight. 
B) lack of rainfall. 
C) cold temperatures. 
D) soil depth. 
E) altitude. 
A) sunlight. 
B) lack of rainfall. 
C) cold temperatures. 
D) soil depth. 
E) altitude.

Question 16

Presently,the Antarctic food chain is being threatened by overexploitation and UV light.

Accepted Answer

A) True 
 B)False

Question 17

What is biogeography? What subjects do biogeographers study?

Accepted Answer

Biogeography is the scientific study of

Question 18

Give an equation for respiration and explain its importance.

Accepted Answer

The equation for respiration is:

C6H12O

Question 19

Which of the following would be true if 100 people could be fed from the grain produced on an acre of land?

Accepted Answer

A) 90 people could be fed if the grain were first fed to the cows-which were then fed to the people. 
B) 75 people could be fed if the grain were first fed to the cows-which were then fed to the people. 
C) 50 people could be fed if the grain were first fed to the cows-which were then fed to the people. 
D) 10 people could be fed if the grain were first fed to the cows-which were then fed to the people. 
E) There is no difference in the number of people that could be fed under each condition. 
A) 90 people could be fed if the grain were first fed to the cows-which were then fed to the people. 
B) 75 people could be fed if the grain were first fed to the cows-which were then fed to the people. 
C) 50 people could be fed if the grain were first fed to the cows-which were then fed to the people. 
D) 10 people could be fed if the grain were first fed to the cows-which were then fed to the people. 
E) There is no difference in the number of people that could be fed under each condition.

Question 20

Fire can actually be beneficial to an ecosystem.

Accepted Answer

A) True 
 B)False

Exam 19: Ecosystem Essentials

Lake turnover occurs during the summer.

Respiration involves

Which of the following expresses the correct relationship?

Energy flows through an ecosystem along a circuit called the

Draw a diagram of a food web and label producers,consumers,and decomposers.

In spite of improvements in pollution control,there is still a need for concern over the health of the Great Lakes ecosystem because of biological magnification.

The study of the spatial aspects of ecology and the distribution of plants and animals is called

A similar progression of plant-community life zones occurs with increased altitude and latitude.

Why do pollutants tend to concentrate at the higher ends of food chains?

Researchers have determined that weak (secondary)interactions in complex food webs are of little or no importance for the health of an ecosystem.

What are important aspects of Humboldt's life-zone concept?

Primary productivity refers to ________ and is greatest in ________.

As climate change progresses,species distributions

Most ecosystems are relatively uniform,with few,if any,patches of former landscapes.

Near the subtropical high pressure centers,net primary productivity is generally limited by

Presently,the Antarctic food chain is being threatened by overexploitation and UV light.

What is biogeography? What subjects do biogeographers study?

Give an equation for respiration and explain its importance.

Which of the following would be true if 100 people could be fed from the grain produced on an acre of land?

Fire can actually be beneficial to an ecosystem.

Essentials of Geography

Solar Energy to Earth and the Seasons

Earth's Modern Atmosphere

Atmosphere and Surface Energy Balances

Global Temperatures

Atmospheric and Oceanic Circulations

Water and Atmospheric Moisture

Weather

Water Resources

Climate Systems and Climate Change

The Dynamic Planet

Tectonics, Earthquakes, and Volcanism

Weathering, Karst Landscapes, and Mass Movement

River Systems and Landforms

Eolian Processes and Arid Landscapes

The Oceans, Coastal Processes, and Landforms

Glacial and Periglacial Processes and Landforms

The Geography of Soils

Terrestrial Biomes

Earth and the Human Denominator

Filters

Primary productivity refers to and is greatest in .