Multiple Choice QuestionsThe circinate vemation is the characteristic feature of ferns. It refers to :
coiling of young leaves
arrangement of leaves on stem
attachment of sori on leaves
heterophilly
A.
coiling of young leaves
The fern leaf, differs from the true leaf (euphyll) of the flowering plants in its vernation, or manner of expanding from the bud. In most ferns, vernation is circinate; that is, the leaf unrolls from the tip, with the appearance of a fiddlehead, rather than expanding from a folded condition. Vernation refers to the growing of a new leaf; circinate refers to the arrangement of the leaf, which is circular.
Gymnosperms are called naked seed plants because these lack :
cotyledon
endosperm
ovary wall
testa
Which of the following plant yields oil and fibre both ?
Cocos nucifera
Eucalyptus
Brassica campestris
Euphorbia hirta
Hydrophytes are characterised by :
thick and large leaf
delicate and mucilagenous stem
short spinous stem
all of the above
Algae are useful because they
are large in number
are used in alcoholic fermentation
purify the atmosphere
are used in curdling of milk.
The plant body of moss (Funaria) is
completely sporophyte
predominantly sporophyte with gametophyte
completely gametophyte
predominantly gametophyte with sporophyte
Which of the following groups of algae belongs to class Rhodophyceae?
Laminaria, Fucus, Porphyra, Volvox
Gelidium, Porphyra, Dictyota, Fucus
Gracilaria, Gelidium, Porphyra, Polysiphonia
Volvox, Spirogyra, Ulothrix, Sargassum
Volvox, Spirogyra, Ulothrix, Sargassum
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