Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Sexual Reproduction in flowering Plants

Long Answer Type

61.

Give a labelled diagram showing

A. Enlarged view of an egg apparatus showing entry of pollen tube into a synergid.
B. Discharge of male gametes into a synergid and the movements of the sperms, one into the egg and the other into the central cell

442 Views

Short Answer Type

62. Why is endosperm in angiospermic ovule considered as more efficient ?

166 Views

63. What are main functions of fruits ?

173 Views

64. Explain the biological and economic importance of fruits.

213 Views

65. What is fate of following in a mature fruits ?
(a) Integument (b) Ovary wall (c) Egg cell (d) Secondary nucleus (e) Antipodal cells.

284 Views

Long Answer Type

66. Differentiate

(a) hypocotyl and epicotyl

(b) Coleoptile and coleorhiza

(d) Perisperm and pericarp.

314 Views

Short Answer Type

67. Why is apple called a false fruit ? Which part of flower form its fruit ?

405 Views

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

230 Views

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

444 Views

70. What is apomixis ? Write its importance.

Apomixis is the development of seed without fertilization. It is a kind of asexual reproduction that mimics sexual reproduction. It does not involve meiosis and syngamy. It occurs in some plant families like —Astreraceae and grasses

Importance of Apomixis

1. It helps in producing hybrid seeds.

2. It is cost effective and time efficient.

3. It helps in the production of hybrid varieties with increased yield.

4. It helps preserve the good characters. As their is no seggregation the farmers can use the seeds again and again for new crops.

1169 Views