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Pollen tube enters the embryo sac usuall...

Pollen tube enters the embryo sac usually

A

Egg cell

B

Central cell

C

Persistent synergid

D

Degenerated synergid

Text Solution

Verified by Experts

The correct Answer is:
D
Degenerated synergid
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Embryo sac is

During double fertilization , the pollen tube enters the embryo sac through (a) Egg cell (b) Persistent synergid (c) Degenerating synergid (d) Central cell

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

ICSE-SEXUAL REPRODUCTION IN FLOWERING PLANTS -COMPETITION CORNER ( OBJECTIVE TYPE QUESTIONS (MULTIPLE CHOICE QUESTIONS ))
  1. The outermost layer of maize endosperm is known as

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  2. Edible part in mango is

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  3. Pollen tube enters the embryo sac usually

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  4. Which one of the following is surrounded by a callose wall ?

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  5. The endosperm in angiosperms develops from

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  6. The fertilisation in which male gametes are carried through pollen tub...

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  7. Which one of the following is resistant to enzyme action?

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  8. Which one of the following pairs of plant structures has haploid numbe...

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  9. What does the filiform apparatus do at the entrance into ovule?

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  10. Unisexuality of flowers prevents

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  11. The plant part which consists of two generations one within the other,...

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  12. In some organisms, karyokinesis is not followed by cytokinesis as a re...

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  13. Nucellar polyembryony occurs in

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  14. Male gametophyte of angiosperms is reduced to

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  15. One of the most resistant biological material present in the exine of ...

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  16. Ubisch bodies are secreted by

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  17. Apomictic embryos in Citrus arise from

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  18. Transfer of pollen grain from anther to stigma of another flower of th...

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  19. Wind pollinated flowers are

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  20. Transfer of pollen grain from anther to stigma of another flower of th...

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