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Pollen tube enters the embryo sac usuall...

Pollen tube enters the embryo sac usually

A

Through one of the synergids

B

Directly pentrates the egg

C

Between one synergid and central cell

D

By knocking of antipodal cell.

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The correct Answer is:
A
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When the pollen tube enters the embryo sac, which of the following cell usually gets burst on its entry:

Describe the structure of the cell(s) that guide(s) the pollen tube to enter the embryo-sac.

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.

In Cucumber, pollen tube enters embryo sac through

Through which cell of the embryo sac, does the pollen tube enter the embryo sac

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

(a) Draw an L.S. of pistil showing pollen tube entering into the embryo sac. Label the following : (i) Nucellus (ii) Antipodals (iii) Synergids (iv) Micropyle (b) Write the functions of the following : (i) Synergids (ii) Micropyle

Movement of pollen tube towards embryo sac is

DINESH PUBLICATION ENGLISH-NO IDEA-Brain Teasers
  1. Pollen tube enters the embryo sac usually

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  2. A structure present in the ovule as well as eggs of birds is

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  3. A plant in which fertilization occurs after the shedding of seed is

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  4. In ovule, exostome is

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  5. Group of specialized thickened nucellar cells between embryo sac and c...

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  6. Hypostase is meant for providing

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  7. A group of specialised nucellar cells between embryo sac and micropyle...

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  8. Sasa paniculata contains a large number of antipodal cells. The number...

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  9. Antipodal cells enlarge tremendously in (a) Sasa (b) Caltha (c) Ac...

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  10. Which one develops from funicle of base of ovule? (a) Sarcotesta (b) ...

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  11. Which one develops from exostome

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  12. In tenuinucellate ovules, the nucellus may break down. The nourishment...

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  13. Endothelium develops from (a) Nucellus (b) Nucellus surrounding embr...

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  14. Middle layers of pollen sac wall are absent in

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  15. Growth of pollen tube is

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  16. The apical growing region of pollen tube is called

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  17. Functional part of pollen tube is separated from the rest by

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  18. Pollen tube cytoplasm is like any other living cell in showing (a) Cal...

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  19. Male nucleus fuses with female nucleus during fertilization in Angiosp...

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  20. Which one is true of male gamete of angiosperms

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  21. Heterofertilization is

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