10 terms

Energy Transformation

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Primary producers generally form the smallest trophic level of a pyramid of energy.
False
Which of the following is not true concerning the flow of energy through an ecosystem?
d.
Most of the energy from photosynthesis flows out as heat.
Which of the following is a product of respiration resulting from the breaking of carbon-carbon bonds?
c.
carbon dioxide
Most energy enters ecosystems in the form of sunlight.
True
Primary productivity is not limited by _______.
b.
time
Energy must be transformed in ecosystems because _______.
d.
all of the above
Which of the following best describes the solar radiation absorbed by and radiated from earth?
d.
Earth's surface absorbs little of the energy that strikes as solar radiation.
What percentage of the energy flowing through primary producers is ultimately transferred to secondary consumers?
c.
1%
Energy in most ecosystems must flow through autotrophs because ______.
a.
only autotrophs can convert solar energy into chemical energy
The energy value listed for foods refers to the _______.
b.
amount of energy available as fuel for the body
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