Question 1

Tropical rain forest soils are usually

Accepted Answer

A)  nutrient-rich. 
B)  low in organic matter. 
C)  nutrient-poor and low in organic matter. 
D)  nutrient-rich and low in organic matter. 
E)  nutrient-poor. 
A)  nutrient-rich. 
B)  low in organic matter. 
C)  nutrient-poor and low in organic matter. 
D)  nutrient-rich and low in organic matter. 
E)  nutrient-poor.

Question 2

The concentration of the pesticide DDT is likely lowest in which organism?

Accepted Answer

A)  a seagull 
B)  a minnow 
C)  a mosquito larvae 
D)  algae 
E)  plankton 
A)  a seagull 
B)  a minnow 
C)  a mosquito larvae 
D)  algae 
E)  plankton

Question 3

On Earth,solar energy is most intense at

Accepted Answer

A)  the South Pole. 
B)  the North Pole. 
C)  60°N latitude. 
D)  the equator. 
E)  60°S latitude. 
A)  the South Pole. 
B)  the North Pole. 
C)  60°N latitude. 
D)  the equator. 
E)  60°S latitude.

Question 4

Which is not an important biogeochemical cycle on Earth?

Accepted Answer

A)  ATP cycle 
B)  water cycle 
C)  carbon cycle 
D)  phosphorus cycle 
E)  nitrogen cycle 
A)  ATP cycle 
B)  water cycle 
C)  carbon cycle 
D)  phosphorus cycle 
E)  nitrogen cycle

Question 5

The Earth has a constant tilt of ________ on its axis from its plane of orbit.

Accepted Answer

A)  12.5 degrees 
B)  23.5 degrees 
C)  30 degrees 
D)  9 degrees 
E)  5.5 degrees 
A)  12.5 degrees 
B)  23.5 degrees 
C)  30 degrees 
D)  9 degrees 
E)  5.5 degrees

Question 6

An organism that can use solar energy and inorganic substances to produce all the organic material it requires is a(n)

Accepted Answer

A)  primary producer and heterotroph. 
B)  heterotroph. 
C)  autotroph and primary producer. 
D)  autotroph. 
E)  primary producer. 
A)  primary producer and heterotroph. 
B)  heterotroph. 
C)  autotroph and primary producer. 
D)  autotroph. 
E)  primary producer.

Question 7

The photic zone

Accepted Answer

A)  has the most nutrients closer to land. 
B)  is an area with sufficient light for photosynthesis. 
C)  has an abundance of photosynthetic organisms. 
D)  is very shallow. 
E)  All of the answer choices are correct. 
A)  has the most nutrients closer to land. 
B)  is an area with sufficient light for photosynthesis. 
C)  has an abundance of photosynthetic organisms. 
D)  is very shallow. 
E)  All of the answer choices are correct.

Question 8

Decomposers

Accepted Answer

A)  obtain nutrients from detritus. 
B)  return organic molecules to their inorganic form. 
C)  include bacteria. 
D)  include fungi. 
E)  All answers are correct. 
A)  obtain nutrients from detritus. 
B)  return organic molecules to their inorganic form. 
C)  include bacteria. 
D)  include fungi. 
E)  All answers are correct.

Question 9

The term abiotic means nonliving.

Accepted Answer

A) True 
 B)False

Question 10

Species that are the first to colonize an area are termed ________ species.

Accepted Answer

A)  keystone 
B)  primary 
C)  tertiary 
D)  pioneer 
E)  secondary 
A)  keystone 
B)  primary 
C)  tertiary 
D)  pioneer 
E)  secondary

Question 11

The remaining energy in the producer level that is available for consumers is the

Accepted Answer

A)  net primary consumption. 
B)  gross primary production. 
C)  gross primary consumption. 
D)  net primary production. 
E)  net energy fixation. 
A)  net primary consumption. 
B)  gross primary production. 
C)  gross primary consumption. 
D)  net primary production. 
E)  net energy fixation.

Question 12

Based on the 10% rule,if there are 10,000 calories of net primary productivity in an ecosystem,how much energy will be generally available to a secondary consumer?

Accepted Answer

A)  1,000 calories 
B)  100 calories 
C)  10,000 calories 
D)  10 calories 
E)  1 calorie 
A)  1,000 calories 
B)  100 calories 
C)  10,000 calories 
D)  10 calories 
E)  1 calorie

Question 13

Streams lead to rivers that carry water and sediment toward the ocean or an interior basin.

Accepted Answer

A) True 
 B)False

Question 14

Some scientists predict that as atmospheric carbon dioxide levels increase,plant growth will also increase.What is the best explanation for this hypothesis?

Accepted Answer

A)  Plants consume carbon dioxide from the atmosphere during photosynthesis. 
B)  Plants release carbon dioxide into the atmosphere during photosynthesis. 
C)  Plants consume carbon dioxide from the atmosphere during respiration. 
D)  Plants release carbon dioxide into the atmosphere during respiration. 
E)  No answer is correct. 
A)  Plants consume carbon dioxide from the atmosphere during photosynthesis. 
B)  Plants release carbon dioxide into the atmosphere during photosynthesis. 
C)  Plants consume carbon dioxide from the atmosphere during respiration. 
D)  Plants release carbon dioxide into the atmosphere during respiration. 
E)  No answer is correct.

Question 15

In ecology,a ________ community is one that remains fairly constant over time.

Accepted Answer

A)  punctuated 
B)  climax 
C)  keystone 
D)  primary 
E)  tertiary 
A)  punctuated 
B)  climax 
C)  keystone 
D)  primary 
E)  tertiary

Question 16

The different seasons of the year are caused by the

Accepted Answer

A)  tilt of the Earth's axis as the Earth travels around the Sun. 
B)  rotation of the Earth around the Sun. 
C)  rotation of the Earth on its axis. 
D)  rotation of the moon around the Earth. 
E)  gravitational pull of the moon as it travels around the Earth. 
A)  tilt of the Earth's axis as the Earth travels around the Sun. 
B)  rotation of the Earth around the Sun. 
C)  rotation of the Earth on its axis. 
D)  rotation of the moon around the Earth. 
E)  gravitational pull of the moon as it travels around the Earth.

Question 17

As you climb the mountain,why are the biomes changing?

Accepted Answer

A)  The air is thinner. 
B)  The latitude is changing. 
C)  More rain falls in a rain shadow. 
D)  Some animals live better at higher elevations. 
E)  It is colder. 
A)  The air is thinner. 
B)  The latitude is changing. 
C)  More rain falls in a rain shadow. 
D)  Some animals live better at higher elevations. 
E)  It is colder.

Question 18

A relationship between different species in which one species lives in or on another is

Accepted Answer

A)  resource partitioning. 
B)  coevolution. 
C)  symbiosis. 
D)  predation. 
E)  niche sharing. 
A)  resource partitioning. 
B)  coevolution. 
C)  symbiosis. 
D)  predation. 
E)  niche sharing.

Question 19

Scientists observed that over the past 40 years,marmots,a type of ground squirrel,are located at increasing elevations on mountains.What is the best explanation for this observation?

Accepted Answer

A)  The marmots are adapting to the cold temperatures. 
B)  Other species are competing with the marmots for their normal habitat. 
C)  More snow and rain is falling at the top of the mountains. 
D)  It is becoming colder at the top of the mountains. 
E)  It is becoming warmer at the top of the mountains. 
A)  The marmots are adapting to the cold temperatures. 
B)  Other species are competing with the marmots for their normal habitat. 
C)  More snow and rain is falling at the top of the mountains. 
D)  It is becoming colder at the top of the mountains. 
E)  It is becoming warmer at the top of the mountains.

Question 20

The ________ states that two species cannot coexist indefinitely in the same niche.

Accepted Answer

A)  endosymbiotic theory 
B)  zonal exclusion theory 
C)  co-inclusion principle 
D)  second law of thermodynamics 
E)  competitive exclusion principle 
A)  endosymbiotic theory 
B)  zonal exclusion theory 
C)  co-inclusion principle 
D)  second law of thermodynamics 
E)  competitive exclusion principle

Exam 19: Communities and Ecosystems

Tropical rain forest soils are usually

The concentration of the pesticide DDT is likely lowest in which organism?

On Earth,solar energy is most intense at

Which is not an important biogeochemical cycle on Earth?

The Earth has a constant tilt of ________ on its axis from its plane of orbit.

An organism that can use solar energy and inorganic substances to produce all the organic material it requires is a(n)

The photic zone

Decomposers

The term abiotic means nonliving.

Species that are the first to colonize an area are termed ________ species.

The remaining energy in the producer level that is available for consumers is the

Based on the 10% rule,if there are 10,000 calories of net primary productivity in an ecosystem,how much energy will be generally available to a secondary consumer?

Streams lead to rivers that carry water and sediment toward the ocean or an interior basin.

Some scientists predict that as atmospheric carbon dioxide levels increase,plant growth will also increase.What is the best explanation for this hypothesis?

In ecology,a ________ community is one that remains fairly constant over time.

The different seasons of the year are caused by the

As you climb the mountain,why are the biomes changing?

A relationship between different species in which one species lives in or on another is

Scientists observed that over the past 40 years,marmots,a type of ground squirrel,are located at increasing elevations on mountains.What is the best explanation for this observation?

The ________ states that two species cannot coexist indefinitely in the same niche.

The Scientific Study of Life

The Chemistry of Life

Cells

The Energy of Life

Photosynthesis

Respiration and Fermentation

DNA Structure and Gene Function

DNA Replication,Binary Fission,and Mitosis

Sexual Reproduction and Meiosis

Patterns of Inheritance

DNA Technology

Forces of Evolutionary Change

Evidence of Evolution

Speciation and Extinction

Evolution and Diversity of Microbial Life

Evolution and Diversity of Plants

Evolution and Diversity of Animals

Populations

Preserving Biodiversity

Plant Form and Function

Reproduction and Development of Flowering Plants

Animal Tissues and Organ Systems

The Nervous System and the Senses

The Endocrine System

The Skeletal and Muscular Systems

The Circulatory and Respiratory Systems

The Digestive and Urinary Systems

The Immune System

Animal Reproduction and Development

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