Class XII · Biology practice

Sexual Reproduction in Flowering Plants MCQs

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501 questions in this collection · Page 29 of 51

Question 281 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

The tapetal cells are generally:

Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus.

Question 282 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

Sporopollenin is absent at the:

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

Question 283 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

In which plants does the pollen grain viability last for months?

In some members of Rosaceae, Leguminoseae and Solanaceae, they maintain viability for months.

Question 284 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

The arrangement of microspores in a cluster of four cells is called:

The microspores, as they are formed, are arranged in a cluster of four cells–the microspore tetrad.

Question 285 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

Which part of the pistil contains the ovarian cavity?

Inside the ovary is the ovarian cavity (locule).

Question 286 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

In the 8-nucleate embryo sac, how are the nuclei distributed?

3 cells (egg apparatus) at micropylar end, 3 cells (antipodals) at chalazal end, and 2 polar nuclei in the large central cell.

Question 287 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

Pollination involving the transfer of pollen from the anther to the stigma of the SAME flower is:

Transfer of pollen grains from the anther to the stigma of the same flower... is called autogamy.

Question 288 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

Flowers that do not open at all are termed:

Cleistogamous flowers which do not open at all.

Question 289 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

Which agent is the dominant biotic pollinating agent?

Among the animals, insects, particularly bees are the dominant biotic pollinating agents.

Question 290 of 501

📘 CLASS XII

Sexual Reproduction In Flowering Plants

What is the function of the "coleoptile"?

Epicotyl has a shoot apex and a few leaf primordia enclosed in a hollow foliar structure, the coleoptile.

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