Class XII · Biology practice

Sexual Reproduction in Flowering Plants MCQs

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501 questions in this collection · Page 19 of 51

Question 181 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

The innermost layer of the anther wall is called:

The innermost wall layer is the tapetum.

Question 182 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

Cells of sporogenous tissue undergo which division to form microspore tetrads?

Cells of the sporogenous tissue undergo meiotic divisions to form microspore tetrads.

Question 183 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

Pollen grains represent the:

The pollen grains represent the male gametophytes.

Question 184 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

The exine of pollen grains is made of:

The hard outer layer called the exine is made up of sporopollenin.

Question 185 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

Germ pores are areas on the exine where:

Pollen grain exine has prominent apertures called germ pores where sporopollenin is absent.

Question 186 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

The vegetative cell of the pollen grain has:

The vegetative cell... has abundant food reserve and a large irregularly shaped nucleus.

Question 187 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

In 60% of angiosperms, pollen is shed at:

In over 60 per cent of angiosperms, pollen grains are shed at this 2-celled stage.

Question 188 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

Parthenium or carrot grass causes:

Parthenium or carrot grass... causes pollen allergy.

Question 189 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

Pollen grains can be stored in liquid nitrogen at:

It is possible to store pollen grains... in liquid nitrogen (-196 C).

Question 190 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

A multicarpellary, syncarpous pistil is found in:

Pistils may be fused together (syncarpous) (Figure 1.7b - Papaver).

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