The peristomial teeth in Funaria are
A) Hydric
B) Xeric
C) Mesic
D) Hygroscopic
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The peristomial teeth in Funaria are Mesic
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Answer:
Option D) Hygroscopic
Explanation:
- The diploid zygote in Funaria develops into a spore-producing plant called a sporophyte. This mature sporophyte is differentiated into foot, seta and capsule.
- The capsule is a pear-shaped, green, yellow, or orange erect or pendent-shaped structure that helps in the production and dispersal of spores. This consists of 3 parts: apophysis, theca, and operculum.
- The operculum represents the lid or upper region of the capsule enclosing the peristome. Just below the operculum lies the peristome consisting of two rings of long, conical teeth(each of 16 teeth), one within the other.
- The spores are dispersed due to the hygroscopic movements of peristomial teeth. So when they dry they open out, and help in spore dispersal.
Hence option D) is correct.
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