[Campbell Biology P.691] Which of the following statements accurately describes one of the g... | Practice Question

Which of the following statements accurately describes one of the genera within Phylum Gnetophyta?

  • A: *Gnetum* species are known for producing ephedrine, used as a decongestant.
  • B: *Ephedra* species are exclusively tropical trees and vines.
  • C: *Welwitschia mirabilis* is a single species found in southwestern African deserts, known for its long lifespan and large straplike leaves.
  • D: All three genera (*Gnetum*, *Ephedra*, and *Welwitschia*) primarily inhabit tropical rainforests.

Explanation

The text explicitly states: 'This genus Welwitschia consists of one species, Welwitschia mirabilis , a plant that can live for thousands of years and is found only in the deserts of southwestern Africa. Its straplike leaves are among the largest leaves known.'