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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, hilum, antipodals male gametes and secondary nucleus .

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Longitudinal section of a post pollinated pistil.
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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, Hilium, antipodals, male gametes and secondary nucleus.

Entry of pollen tube into the embryo sac takes place from a. Chalazal end b. Micropylar end c. Integuments

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

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

(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 ?

Function of guiding and attracting pollen tube is done by (a) Egg cell (b) Filiform apparatus (c) Antipodal cells (d) Secondary nucleus

Draw a labelled diagram of a mature embryo sac. Why does a pollen grain possesses 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

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?

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.

TRUEMEN BIOLOGY ENGLISH-REPRODUCTION-SECTION -C
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  5. In an angiosperm the embryo sac is haploid , zygote is diploid and end...

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  6. Draw a longitudinal section of a post-pollinated pistil showing entry ...

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  7. (i ) Write the characteristics features of anther, pollen and stigma o...

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  8. (a) Mention any four strategies adopted by flowering plants to prevent...

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  10. Differentiate between perisperm and endosperm giving one example of ea...

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  11. Fertilization is essential for the production of seed, but in some ang...

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  13. Write the function of each of the following : (a) Middle piece in hu...

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  14. Write the function of each of the following : (a) Seminal vesicle ...

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  17. Draw the following diagrams related to human reproduction and label th...

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  19. a) Describe the endosperm development in coconut. b) Why is tender c...

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  20. Write the changes a fertilized ovule undergoes within the ovary in an ...

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