Describe longitudinal section of a pistil showing pollen germination. Explain the events in the embryo sac during the process of fertilisation. Which resulting stages give rise to the embryo and the endosperm respectively?

Draw a well labelled diagram of the longitudinal section of a pistil showing pollen germination .

During the process of fertilisation the pollen tube of the pollen grain usually enters the embryo sac through

Draw a longitudinal section of a post-pollinated pistil showing entry of pollen tube into a mature embryo-sac. Label filiform apparatus, chalazal end, hilum, antipodals male gametes and secondary nucleus .

Draw a longitudinal section of a post-pollinated pistil showing entry of Pollen, tube into a mature embryo-sac. Label filiform apparatus, chalazal end, Hilium, antipodals, male gametes and secondary nucleus.

Name the stage of human embryo at which it gets implanted. Explain the process of implantation.

Give scientific terms for the following: A food-laden tissue differentiated inside the embryo sac after double fertilisation from the primary endosperm nucleus.

The plant part which consist of two generations one within the other: Pollen grains inside the anther Germinated pollen grain with two gametes Seed inside the fruit Embryo sac inside the ovule

a) Draw a L.S. of a pistil showing pollen tube entering the embryo-sac in an angiosperm and label any six parts other than stigma, and ovary. b) Write the changes a fertilized ovule undergoes within the ovary in an angiosperm plant.

Draw a longitudinal section of the pistil from a flowering plant, where pollination has occurred. Label the following: (a) Stigma showing germinating pollen grains (b) Style (c) Pollen tube reaching the micropyle of the ovule (d) Embryo sac (e) Components of the egg apparatus

(a) Draw the longitudinal section of a flower showing growth of pollen tube upto the embryo sac.Label the following parts : (i) Stigma (ii) Pollen tube (iii) Integument (iv) Chalazal end (v) Nucelllus (vi) Synergids (b) What is double fertilisation in Angiosperms? Why is it so called ?