[Campbell Biology P.674] What is the primary function of the peristome in a moss capsule? | Practice Question

What is the primary function of the peristome in a moss capsule?

  • A: Performing photosynthesis to produce sugars for the sporophyte.
  • B: Absorbing water from the environment to nourish developing spores.
  • C: Facilitating the gradual discharge of spores via wind dispersal.
  • D: Providing structural rigidity to the capsule against physical damage.

Explanation

The text describes the peristome as 'interlocking, tooth-like structures' that 'open under dry conditions and close again when it is moist. This allows moss spores to be discharged gradually, via periodic gusts of wind that can carry them long distances.' This clearly indicates its role in spore dispersal.