In sunny, hot weather, corn, which is a C 4 plant, has a survival advantage over wheat, which is a C 3 plant, because

Corn, a C4 plant, has a mechanism to concentrate CO2 around rubisco, reducing photorespiration and increasing efficiency under conditions where stomata are closed to minimize water loss. Wheat, a C3 plant, lacks this mechanism.

In sunny, hot weather, corn, which is a C 4 plant, has a survival advantage over wheat, which is a C 3 plant, because

Corn, a C4 plant, has a mechanism to concentrate CO2 around rubisco, reducing photorespiration and increasing efficiency under conditions where stomata are closed to minimize water loss. Wheat, a C3 plant, lacks this mechanism.

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In Sunny, Hot Weather, Corn, Which Is a C₄ Plant

Question 62

Multiple Choice

In sunny, hot weather, corn, which is a C₄ plant, has a survival advantage over wheat, which is a C₃ plant, because

A) wheat loses water through its stomata and corn does not.
B) wheat is less efficient in its use of ATP than corn is.
C) corn undergoes photorespiration and wheat does not.
D) corn is able to keep its stomata open and wheat cannot.
E) corn keeps CO₂ levels high around rubisco even when stomata are closed.

Correct Answer: