Question

English

Gujarati

Hindi

1.Sexual Reproduction in Flowering Plants

medium

Assertion : Pollen mother cells $(PMCs)$ are the first male gametophytic cells.
Reason : Each $PMC$ gives rise to two pollens.

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If both the Assertion and Reason are incorrect.

(AIIMS-2009)

Solution

Primary sporogenous cell gives rise to microspore mother cells or pollen mother cells $(PMCs)$. They are sporophytic in nature i.e., diploid. These cells undergo meiosis (reduction division) which gives rise to $4$ microspores or pollens and this formation of microspores or pollens is called microsporo-genesis. Microspores represent the beginning of the gametophytic phase and they are haploid in nature.

Std 12

Biology

The cell that divides to form two male nuclei in angiosperms is

medium

Which one of the following statements is not true?

medium

(NEET-2016)

Make the correct pair :

Column $- I$ Column $- II$

A- Tapetum i- Degenerate during development

B- Intine ii- Resistant organic materials

C- Vegetative cell iii- Pollen tube

D- Sporopollenin iv- Provide nourishment to pollen grains

medium

$A$ : Formation of mature male gametophyte requires one meiotic and one mitotic division in $60\;\% $ of the
angiosperms.
$R$ : Pollination occurs in three celled condition in majority of angiosperms.

medium

In an young anther the four rows of cells which later produce pollen are called

medium

Column $- I$	Column $- II$
A- Tapetum	i- Degenerate during development
B- Intine	ii- Resistant organic materials
C- Vegetative cell	iii- Pollen tube
D- Sporopollenin	iv- Provide nourishment to pollen grains

Assertion : Pollen mother cells $(PMCs)$ are the first male gametophytic cells. Reason : Each $PMC$ gives rise to two pollens.

Solution

Similar Questions

The cell that divides to form two male nuclei in angiosperms is

Which one of the following statements is not true?

Make the correct pair : Column $- I$ Column $- II$ A- Tapetum i- Degenerate during development B- Intine ii- Resistant organic materials C- Vegetative cell iii- Pollen tube D- Sporopollenin iv- Provide nourishment to pollen grains

$A$ : Formation of mature male gametophyte requires one meiotic and one mitotic division in $60\;\% $ of the angiosperms. $R$ : Pollination occurs in three celled condition in majority of angiosperms.

In an young anther the four rows of cells which later produce pollen are called

Assertion : Pollen mother cells $(PMCs)$ are the first male gametophytic cells.
Reason : Each $PMC$ gives rise to two pollens.

Make the correct pair :

Column $- I$ Column $- II$

A- Tapetum i- Degenerate during development

B- Intine ii- Resistant organic materials

C- Vegetative cell iii- Pollen tube

D- Sporopollenin iv- Provide nourishment to pollen grains

$A$ : Formation of mature male gametophyte requires one meiotic and one mitotic division in $60\;\% $ of the
angiosperms.
$R$ : Pollination occurs in three celled condition in majority of angiosperms.