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Q 1315601569.     Blackman demonstrated that increasing illumination increased the photosynthetic rate up to a point when CO_2 becomes limiting. If light was not limiting, temperature becomes limiting. Emerson found that maximum CO_2 fixation could be achieved with brief flashes of light. Mark the correct statement in the following.

A

Only one factor can be limited in photosynthesis.

B

The trapping of light by chloroplast is temperature dependent.

C

The trapping of light by chloroplast can occur only if CO_2 is present.

D

Photosynthesis consists of a light and dark reaction.

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