Tetradynamous stamens are found in :
Chrysanthemum
Zinnia
Poppy
Brassica
D.
Brassica
Tetradynamous condition of stamens is found in mustard (Brassica campestris) plant of Family- Cruciferae (Brassicaceae). In tetradynamous condition, there are six stamens, four stamens remain long and two short.
Pollination occuring from one flower to another of same plant is :
autogamy
allogamy
geitenogamy
none of these
Anthesis means
growth of pollen tube inside the carpel
dehiscence of anthers
opening of floral bud
emergence of anthers
Seed which are able to withstand reduction in moisture and temperature are called
dormant seeds
recalcitrant seeds
orthodox seeds
non- viable seeds
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
Removal of top fertile soil by wind or water is :
Siltation
Soil erosion
Weathering of soil
Leaching