Removal of top fertile soil by wind or water is :

• Siltation

• Soil erosion

• Weathering of soil

• Leaching

312.

Pollination occuring from one flower to another of same plant is :

• autogamy

• allogamy

• geitenogamy

• none of these

Aleuron layer is found in :

• embryo

• nucellus

• endosperm

• endodermis

Phytochrome occurs in two forms. In which form it promotes the germination of seeds of some species ?

• P_fr forms

• P_r forms

• Both forms

• None of these

Tetradynamous stamens are found in :

• Chrysanthemum

• Zinnia

• Poppy

• Brassica

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

Xenia and metaxenia terms are related with

• pollen culture

• xylem and phloem

• endosperm

• embryo

Elater mechanism for seed dispersal is exhibited by

• Riccia

• Dryopteris

• Funaria

• Marchantia

Megasporophyll of Cycas has the same nature as

• stamen

• petal

• sepal

• carpel