C4 plants have a lower CO2 compensation point than C3 plants because Select one:

Question

C4 plants have a lower CO2 compensation point than C3 plants because Select one: O a. The initial carboxylation enzyme is RUBISco which has a high affinity for CO2. b. C4 plants live in environments where the CO2 concentration is lower. C. C3 plants only use PEP carboxylase which has a low affinity for CO2. d. C4 plants expend more energy maintaining their photosynthetic machinery e. The initial carboxylation enzyme is PEP carboxylase which has a high affinity for CO2. CAM photosynthesis loses much less water than C4 or C3 photosynthesis because Select one: a. CAM plants open their stomata at night b. CAM plants open their stomata during the day OC. CAM plants only use PEP carboxylase to fix Co2 Od. CAM plants only use RUBISCO to fix CO2 e. This statement is false. CAM plants lose the same amount of water as C3 and C4 plants

Explanation / Answer

Question 1:

Question 2

CAM photosynthesis loses much less water than C4 or C3 photosynthesis because:

REASON: CAM plants open their stomata at night to reduce water loss. They fix carbon dioxide at this time as an intermediate and metabolise it in daytime for production of sugar

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