[Campbell Biology P.1222] According to the text, which of the following is a characteristic f... | Practice Question

According to the text, which of the following is a characteristic feature of deserts?

  • A: They occur primarily in equatorial regions.
  • B: Annual precipitation generally exceeds 50 cm.
  • C: Plants often exhibit C4 or CAM photosynthesis.
  • D: Animals are typically active during the day to conserve water.

Explanation

Deserts are characterized by low precipitation, typically less than 30 cm annually, and occur in bands near 30° north and south latitude and continental interiors. Many desert plants have adaptations like C4 or CAM photosynthesis for efficient water use. A common adaptation for desert animals is being nocturnal to avoid extreme daytime temperatures.