AnswersTX-Environmental Systems BEnergy Transformation

Energy Transformation Answers

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1
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Which of the following is true about the efficiency of energy transfer in an ecosystem?

A
The more energy the organism requires, the more efficient the energy transfer.
B
All energy transfers have the same efficiencies.
C
The less energy the organism requires, the more efficient the energy transfer.
D
The most efficient energy transfers are in large, warm-blooded animals.
2
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Heterotrophs convert solar energy into chemical energy.

A
T
B
F
3

Which of the following best describes the fate of energy in ecosystems?

A
It will ultimately be recycled back into the ecosystem.
B
It flows from secondary consumers to primary consumers.
C
It enters most ecosystems in the form of sunlight.
D
It flows through and is used by ecosystems.
4

The energy in fossil fuels is derived from the energy stored in plant and animal matter.

A
T
B
F
5

The energy value listed for foods refers to the _______.

A
total amount of chemical energy in the food
B
amount of energy available as fuel for the body
C
total nutritional value of the food
D
amount of carbohydrates
6

Primary productivity is not limited by _______.

A
the availability of sunlight
B
time
C
the availability of nutrients
D
access to water
7

Which of the following is a product of respiration resulting from the breaking of carbon-carbon bonds?

A
glucose
B
oxygen
C
carbon dioxide
D
all of the above
8

Most energy enters ecosystems in the form of sunlight.

A
T
B
F
9

Energy in most ecosystems must flow through autotrophs because ______.

A
only autotrophs can convert solar energy into chemical energy
B
autotrophs are simpler organisms than heterotrophs
C
heterotrophs only generate a small fraction of their energy from photosynthesis.
D
all of the above
10

Primary producers generally form the smallest trophic level of a pyramid of energy.

A
T
B
F
11

Energy must be transformed in ecosystems because _______.

A
energy cannot be created or destroyed
B
an organism’s energy must go somewhere
C
an organism’s energy must come from somewhere
D
all of the above
12

The energy used for metabolic processes reduces the efficiency of secondary productivity.

A
T
B
F
13

The energy value listed for foods refers to the _______.

A
total amount of chemical energy in the food
B
amount of energy available as fuel for the body
C
total nutritional value of the food
D
amount of carbohydrates
14

Primary productivity is not limited by _______.

A
the availability of sunlight
B
time
C
the availability of nutrients
D
access to water
15

Which of the following is not true concerning the flow of energy through an ecosystem?

A
Most solar energy is used in photosynthesis.
B
Photosynthesis and cellular respiration are performed by plants.
C
Not all solar energy is used for photosynthesis.
D
Most of the energy from photosynthesis flows out as heat.
16

Energy in most ecosystems must flow through autotrophs because ______.

A
only autotrophs can convert solar energy into chemical energy
B
autotrophs are simpler organisms than heterotrophs
C
heterotrophs only generate a small fraction of their energy from photosynthesis.
D
all of the above
17

Every time energy is transferred between organisms in a food web, some of the energy is lost as heat.

A
T
B
F
18

Which individual would be the safest from a lightening strike?

A
a person standing 8 miles away
B
a person on a bike 8 miles away
C
a person in a tent 8 miles away
D
a person in a house 8 miles away
19

The energy used for metabolic processes reduces the efficiency of secondary productivity.

A
T
B
F
20

Which of the following is not true concerning the flow of energy through an ecosystem?

A
Most solar energy is used in photosynthesis.
B
Photosynthesis and cellular respiration are performed by plants.
C
Not all solar energy is used for photosynthesis.
D
Most of the energy from photosynthesis flows out as heat.

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