Multiple Choice QuestionsProthallus of fem has :
antheridia and archegonia on lower surface
antheridia and archegonia on upper surface
antheridia on upper surface and archegonia on lower
antheridia on lower surface and archegonia on upper surface
Rarely among angiosperms the pollen grains influenced the endosperm. This is called as :
Metaxenia
Nemec phenomenon
Xenia
Mesogamy
A bryophyte which harbours a nitrogen fixing blue-green alga in its thallus is :
Pogonatum
Riccia
Marchantia
Anthoceros
The 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
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