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Draw a longitudinal section of a post-po...

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.

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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 .

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Draw a labelled diagram of the longitudinal section of a maize grain to show the structure of mature embryo.

Draw a longitudianl section of a pistil of an angiosperm showing the growth of the pollen tube up to the micropyle of the ovule. Label (i) stigma, (ii) embryo sac, (iii) polle tube (iv) micropyle.

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

(a) Draw a labelled diagarm of a matures embryo sac . (b) Why does a pollen grain possess two male gametes ? Explain.

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

XII BOARDS PREVIOUS YEAR-XII BOARDS-SECTION-C
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