Rhizoids in Riccia are

Unicellular smooth-walled

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Unicellular tuberculate

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Both smooth-walled and tuberculate unicellular

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Multicelhllar smooth-walled and tuberculate

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Solution

The correct option is D Both smooth-walled and tuberculate unicellular
The rhizoids are unicellular and unbranched. They anchor the thallus to the substratum and are usually of two types, smooth walled and tuberculated. Rhizoids are present in the mid-rib region of thallus.
So, the correct answer is 'Both smooth-walled and tuberculate unicellular'

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Q. Match List I (Plants) with List II(presence of character in the plant body) and select the correct answer using the codes given the lists.

List-I	List-II
a. Riccia	$1$ . Only smooth-walled unicellular rhizoids
b. Marchantia	$2$ . Multicellular rhizoids
c. Anthoceros	$3$ . Rhomboidal areas on dorsal surface
d. Funaria	$4$ . Dorsal groove along sagittal axis

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