[Campbell Biology P.253] What is the primary evolutionary advantage of the C4 photosynthetic... | Practice Question

What is the primary evolutionary advantage of the C4 photosynthetic pathway, particularly in hot, dry climates?

  • A: Enabling plants to perform photosynthesis without water.
  • B: Minimizing photorespiration by concentrating CO2 in bundle-sheath cells.
  • C: Maximizing oxygen production to enhance atmospheric O2 levels.
  • D: Allowing C4 plants to grow faster than C3 plants in all environmental conditions.

Explanation

The C4 photosynthetic pathway is an evolutionary adaptation to hot, dry climates. Its primary advantage is to minimize photorespiration by maintaining a high CO2 concentration in the bundle-sheath cells, which favors photosynthesis over photorespiration, leading to more efficient sugar production.