Multiple Choice QuestionsRemoval of top fertile soil by wind or water is :
Siltation
Soil erosion
Weathering of soil
Leaching
Pollination occuring from one flower to another of same plant is :
autogamy
allogamy
geitenogamy
none of these
Phytochrome occurs in two forms. In which form it promotes the germination of seeds of some species ?
Pfr forms
Pr forms
Both forms
None of these
A.
Pfr forms
Pfr form of phytochrome refers to physiologically active form whereas Pr form refers to inactive form.
Red light formation means the formation of Pfr. It helps in the induction of seed germination. On the contrary, far red light or Pr formation inhibits the germination.
Diadelphous stamens are the characteristic features of :
Ranunculaceae
Fabaceae
Poaceae
Malvaceae
The formation of embryo without fusion of gametes is termed as :
apospory
isogamy
apogamy
syngamy
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