The pteridophyte, popularly known as 'quillwort' is
A
Lycopodium
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B
Selaginella
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C
Isoetes
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D
Marselia
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Solution
The correct option is CIsoetes Isoetes is a mat-forming quillwort, small, rooted aquatic emergent found in very shallow pools on granitic flat rock. Quillworts are mostly aquatic or semi-aquatic in clear ponds and slow-moving streams. Quillwort leaves are hollow and quill-like, arising from a central corm. They are heterosporous.