Multiple Choice QuestionsThe arrangement of the nuclei in a normal embryo sac in the dicot plants is
2+4+2
3+2+3
2+3+3
2+3+3
B.
3+2+3
In angiosperms (dicots), the Polygonum type of embryosac is most common. In this embryosac, the arrangement of the nuclei is 3+2+3 i.e., 3 in antipodal cells, 2 as polar nuclei (which later fuse and form a diploid secondary nucleus); and 3 in egg appratus (2 in synergids and 1 in egg cell).
An enzyme that can stimulate germination of barley seeds is
α-amylase
lipase
protease
protease
In a cereal grain the single cotyledon of embryo is represented by
coleorhiza
scutellum
prophyll
prophyll
Attractants and rewards are required for
Anemophily
Entomophily
Hydrophily
Hydrophily
A dioecious flowering plant prevents both:
Autogamy and xenogamy
Autogamy and geitonogamy
Geitonogamy and xenogamy
Geitonogamy and xenogamy
Functional megaspore in an angiosperm develops into
Ovule
Endosperm
Embryo sac
Embryo sac
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by
Water
Bee
Wind
Wind
Double fertilization is
Fusion of two male gametes of a pollen tube with two different eggs
Fusion of one male gamete with two polar nuclei
Syngamy and triple fusion
Fusion of two male gametes with one egg
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