Biology 9700 · AS & A Level · Movement into and out of cells

Movement into and out of cells — practice question

Halophytes are plants able to survive in areas that are repeatedly exposed to sea water. Sea water has a water potential of approximately $-2500\,\text{kPa}$. Which adaptation would you expect halophytes to have?

  • Aroot hair cells with a very high water potential
  • Broot hair cells which accumulate salts and other solutes
  • Ca high density of stomata that are open most of the time
  • Dleaves that have a large surface area and a thick cuticle

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