A) Trichocyst
B) Heterocyst
C) Rhizophore
D) Glossopodium
Correct Answer: D
Solution :
At the base of ligule there is present a sheath of elongated cells called glossopodium (secretory). This ligule is secretory as well as protective. It secrets water/mucilage to keep growing point of stem and young leaves moist. It also protests young leaves.
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