Plant Photosynthesis and Respiration
The guard cells flanking stomata control the oxygen and carbon dioxide entering the leaf by opening and closing the
veins
leaf pores
stoma
palisade
leaf pores
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The waste products of the process of respiration areA. oxygen + CO2
B. carbon dioxide and water
C. food + oxygen
D. none of them
The fall in the rate of photosynthesis takes place when the temperature rises above
A. 40ยฐC
B. 30ยฐC
C. 20ยฐC
D. 25ยฐC
The balance of two gases is very important for all communities, these two gases are
A. nitrogen and oxygen
B. carbon dioxide and oxygen
C. argon and nitrogen
D. none of them
Photosynthesis increases the concentration of oxygen in air, which is necessary for all
A. living organism
B. fossils
C. birds only
D. animals
Chlorophyll is a
A. single pigment
B. color
C. complex pigment
D. none of them
Glucose and oxygen combine to form carbon dioxide and water plus
A. oxygen
B. energy
C. neon
D. nitrous oxide
The largest percentage composition in air is of
A. argon
B. oxygen
C. nitrogen
D. carbon dioxide
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