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Assertion Nuclear endosperm does not inv...

Assertion Nuclear endosperm does not involve wall formation after each meiotic division.
Reason Coconut milk is an example of cellular endosperm.

A

Both Assertion and Reson ae true and Reason is the correct explanation of Assertion

B

Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion

C

Assertion is true, but Reason is false

D

Assertion is false, but Reason are false

Text Solution

Verified by Experts

The correct Answer is:
C
Nuclear type of endosperm is formed after free nuclear divisions in primary endosperm mother cell. Here , each mitotic divisions does not follow wall formation.
Hence, many nuclei are formed, which remain together in a mass of protoplasm of the embryo sac. Coconut milk is an example of liquid endosperm which is make up of nuclear endosperm.
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Explore conceptually related problems

Assertion : Nuclear endosperm is formed by subsequent nuclear division without wall formation Reason : Coconut is an example of such endosperm, where the endosperm remains nuclear throughout the development of the fruit.

Assertion : Cellular endosperm is formed by both nuclear division and wall formation Reason : It lacks haustoria.

Assertion (A): The coconut water from tender coconut is free nuclear endosperm and the surrounding white kernel in coconut is the cellular endosperm. Reason (R): Primary endosperm nucleus (PEN) undergoes successive nuclear divisions to produce free nuclei.

Assertion An embryo is formed after some meiotic divisions by the product formed after syngamy. Reason: An embryo is the first cell of sporophytic generation.

This section contains Assertion (A) and Reason (R) type questions. Each question has choices (1), (2), (3) and (4), out of which only one is correct. Assertion (A) Endosperm is formed by the fusion of one male gamete and polar nuclei. Reason (R) In pea the retains a part of endosperm as it is not completely used up during embryo development.

(A) : Coconut milk is very rich and nutritive drink. (R) : It is in fact a free nuclear endosperm.

Assertion First meiotic division in primary oocytes results in the formation of two equal sized cells. Reason Both of these cells are equally functional.

Assertion: The conservation of kinetic energy in elastic collision applies after the collision is over and does not hold at very instant of the collision. Reason: During a collision the total linear momentum is conserved at each instant of the collision.

How many of the following statements is / are incorrect ? A. Nuclear type of endosperm is the rarest type of endosperm ,in which the nucleus remains intact. B. Cellular type of endosperm involves both karyokinesis and cytokinesis, simultaneously. C. Cellular type of endosperm is found in coconut .

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