A) 16 + 16
B) 16 + 32
C) 8 + 16
D) 32 + 32
Correct Answer: A
Solution :
The peristome of moss consists of two sets of long conical teeth. There .are 16 teeth in each set, the total being 32. The teeth of both the sets are on the same radii and thus opposite to each other. The teeth of outer set respond to change in humidity and thus are said to be hygroscopic. The presence of peristome teeth guarding the mouth of the theca region and slows the rate of spore discharge.
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