Write True or False.
Pollen grains are considered as male gamates m plants.

Pollen grains are the carrier of male gametes in

Where the pollen grains are formed in a plant?

Assertion. A pollen grain of angiosperm is considered as the male gametophyte . Reason. All the nuclei of the pollen grain produce male gametes.

Draw a labelled diagram of a m.ature embryo sac Why does a pollen grain possess two male gametes? Explain.

Read the following statements and find out the incorrect statements. a. In majority of organisms, male gamete is motile and female gamete is non-motile (stationary). b. In algae and fingi, both male and femla egaetes are non-motile. c. In seed plants, pollen grains are the carrier of male gaemtes and ovule has the egg. d. In dioecious plants, pollination facilitates trasnfer of pollen grains to the stigma. e. In monoecious animals, since male and female gametes are formed in different individuals, the organism must evolve special mechanism for gamete transfer.

Choose the correct options I. Gametes are always produced from diploid parent plant body. II. Meiocytes are sporocytes in all plants. III. The gymnosperms and pteriodophytes have diploid parent body. IV. In seed plants, pollen grains are carrier of male gametes.

Consider the following statements with respect to the flowering plants and choose the correct option (a) Pollen grains represent the male gametes (b) Functional megaspore develops innto embryo sac that represents the female gamete (c) Transfer of pollen grains from anther to stigma of different plant is known as xenogamy (d) Transfer of pollen grains from anther to stigma of another flower of the same plant is known as geitonogamy

State True or False (i) Shedding of pollen grains takes place at three celled stage in 60% os angiosperms (ii) Pollen viablity period for rice is 30 minutes

State true or false: All green plants are autotrophs.