[Campbell Biology P.848] Which of the following statements accurately describes a xerophytic... | Practice Question

Which of the following statements accurately describes a xerophytic adaptation discussed in the text?

  • A: Ocotillo remains leafy throughout the year to maximize photosynthesis, storing water in its leaves.
  • B: Oleander leaves have trichomes to increase airflow over stomata, promoting evaporative cooling.
  • C: Old man cactus bristles absorb sunlight to generate heat, aiding in water retention.
  • D: Oleander stomata are recessed in crypts, along with trichomes, to create a humid microenvironment reducing transpiration.

Explanation

The text states that Oleander stomata are recessed in cavities called 'crypts,' an adaptation that reduces the rate of transpiration by protecting the stomata from hot, dry wind. Trichomes also help minimize transpiration by breaking up the flow of air, allowing the chamber of the crypt to have a higher humidity.