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Double Fertilisation

The cell with...

Question

The cell with filiform apparatus is present towards the (a)end of the embryo sac and it_(b)________after fertilisation.

A

a - chalazal, b - degenerates

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B

a - micropylar, b - forms endosperm

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C

a - micropylar, b - degenerates

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D

a - chalazal, b - forms endosperm

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Solution

The correct option is C a - micropylar, b - degenerates
Filiform apparatus are cellular thickenings in the synergids. They guide the pollen tube towards the synergids. Due to this the pollen tube enters the synergids and releases the male gametes into the embryo sac.

Synergids are located at the micropylar end of the embryo sac.

They degenerate after fertilisation.

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Similar questions

Q. Select the correct statement(s) regarding the structure of a mature embryo sac.
(i) Egg apparatus is situated towards chalazal end.
(ii) Antipodal cells are situated towards micropylar end.
(iii) a typical angiospermic embryo sac is

7

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nucleate at maturity.

Q. Choose the correct statement(s).
Statement 1: In a mature embryo sac, egg apparatus is situated towards the chalazal end.
Statement 2: In a mature embryo sac, antipodal cells are situated towards the micropylar end.
Statement 3: An angiosperm embryo sac is 7-celled 8-nucleate at maturity.

Q. The number of nuclei migrating from each of the micropylar quartet and chalazal quartet to the centre of the normal embryo sac is

Q. The cell with filiform apparatus is present towards the __(a)____end of the embryo sac and it_____(b)__________after fertilisation.

Q. Select the correct statements regarding the structure of a mature embryo sac.

a) Egg apparatus consists one egg cell and two synergids.
(b) Antipodals cells are situated towards micropylar end.
(c) Polygonum type of embryo sac is most common type in angiosperms.
(d) Polar nuclei are situated below the egg apparatus in the larger central cell.

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Double Fertilisation

Standard XII Biology

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