Course

General Biology

Study Pack

Set 55 Ecosystems And Restoration Ecology

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Question 1

(Multiple Choice)

Free
What are two key factors controlling primary productivity in lakes and oceans?

A)light and nutrients
B)nutrients and temperature
C)light and temperature
D)light and phytoplankton
E)nutrients and wind

Answer

Question 2

(Multiple Choice)

Free
What percentage of solar radiation striking a plant is converted into chemical energy?

A)1%
B)10%
C)25%
D)50%
E)100%

Answer

Question 3

(Multiple Choice)

Free
Approximately 1% of the solar radiation that strikes a plant is converted into the chemical bond energy of sugars.Why is this amount so low?

A)Approximately 99% of the solar radiation is converted to heat energy.
B)Only 1% of the wavelengths of visible light are absorbed by photosynthetic pigments.
C)Most solar energy strikes water and land surfaces.
D)Approximately 99% of the solar radiation is reflected.
E)Only the green wavelengths are absorbed by plants for photosynthesis.

Answer