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NCERT solutions Biology Textbook for Class 12 chapter 2 Sexual Reproduction in Flowering Plants

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Chapter 2 - Sexual Reproduction in Flowering Plants

Pages 40 - 41

Name the parts of an angiosperm flower in which development of male and female gametophyte take place

Q 1 | Page 40 | view solution

Differentiate between microsporogenesis and megasporogenesis

Q 2.1 | Page 40 | view solution

Which type of cell division occurs during these events (microsporogenesis and megasporogenesis) ?

Q 2.2 | Page 40 | view solution

Arrange the following terms in the correct developmental sequence:

Pollen grain, sporogenous tissue, microspore tetrad, pollen mother cell, male gametes

Q 3 | Page 40 | view solution

With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.

Q 4 | Page 40 | view solution

What is meant by monosporic development of female gametophyte?

Q 5 | Page 40 | view solution

With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.

Q 6 | Page 40 | view solution

What are chasmogamous flowers?

Q 7.1 | Page 41 | view solution

Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.

Q 7.2 | Page 41 | view solution

Mention two strategies evolved to prevent self-pollination in flowers.

Q 8 | Page 41 | view solution

What is self-incompatibility?

Q 9.1 | Page 41 | view solution

Why does self-pollination not lead to seed formation in self-incompatible species?

Q 9.2 | Page 41 | view solution

What is bagging technique? How is it useful in a plant breeding programme?

Q 10 | Page 41 | view solution

What is triple fusion?

Q 11.1 | Page 41 | view solution

Where and how does triple fusion take place? Name the nuclei involved in triple fusion

Q 11.2 | Page 41 | view solution

Why do you think the zygote is dormant for sometime in a fertilized ovule?

Q 12 | Page 41 | view solution

Differentiate between Hypocotyl and epicotyl

Q 13.1 | Page 41 | view solution

Differentiate between Coleoptile and coleorrhiza;

Q 13.2 | Page 41 | view solution

Differentiate between Integument and testa;

Q 13.3 | Page 41 | view solution

Differentiate between Perisperm and pericarp

Q 13.4 | Page 41 | view solution

Why is apple called a false fruit? Which part(s) of the flower forms the fruit?

Q 14 | Page 41 | view solution

What is meant by emasculation? When and why does a plant breeder employ this technique?

Q 15 | Page 41 | view solution

If one can induce parthenocarpy through the application of growth substances, which fruits would you select to induce parthenocarpy and why?

Q 16 | Page 41 | view solution

Explain the role of tapetum in the formation pollen-grain wall.

Q 17 | Page 41 | view solution

What is apomixis and what is its importance?

Q 18 | Page 41 | view solution

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