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Sexual Reproduction in flowering Plants

Short Answer Type

41. What is pollination ? Name different types of pollination.

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42. What do you understand by double fertilization ?

407 Views

43. Give an account of significance of double fertilization.

944 Views

Long Answer Type

44. What is bagging technique ? How is it useful in plant breeding programmes ?

944 Views

Short Answer Type

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

413 Views

46. Compare the structure of a non-endospermic (non-albuminous) seed with an endospermic (albuminous) dicot seed.

Non-endospermic Seed

Endospermic Seed

1. The testa is soft and thin.

2. The endosperm is absent.

3. The cotyledons are thick.

4. The food is stored in the cotyledons.

Examples : Pea, Bean and Mustard.

1. The testa is very hard and brittle.

2. The endosperm is present.

3. The cotyledons are thin and papery.

4. The food is stored inside the endosperm.

Examples : Rice, wheat, maize, castor.

258 Views

Long Answer Type

47. Differentiate between microsporogenesis and megasporogenesis. Which type of cell division occurs during these events ? Name the structures formed at the end of these two events.

1552 Views

Short Answer Type

48. Arrange the following terms in a correct development sequence :
Pollen grain, sporogenous tissue, microspore tetrad, pollen mother cell, male gamete.

369 Views

49. What do you mean by monosporic development of female gametophyte ?

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50. With a neat diagram explain the 7-celled, Eight nucleate mature female gametophyte.

410 Views