Multiple choice

Teeth of moss peristome are mainly chitinous and are

  1. 8 + 8 in number

  2. 16 + 8 in number

  3. 16 + 16 in number

  4. 32 + 32 in number

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Each peristome is a ring of triangular "teeth" formed from the remnants of dead cells with thickened cell walls. There are usually 16 such teeth in a single peristome, separate from each other and able to both fold in to cover the stoma as well as fold back to open the stoma.