On the basis of the relationship between the first pair of words write a suitable word in the gap of the second word pair. Fragmentation : Spirogyra :: Budding : _______.

Describe how Yeast completes the process of budding.

Explain how Bryophyllum undergoes vegetative propagation with the help of an adventitious bud.

Explain the following three significances of cell division- Growth Repair Reproduction Tabulate the site of occurrences of meiotic cell division in the living world. [3+2=5] OR Explain the process of micropropagation. Distinguish between asexual and sexual reproduction on the basis of the following three features - No. of Parental organisms Cell Division Origin of variation [2+3=5]

c — Asexual Reproduction Sexual Reproduction I. Requires two parental organisms of opposite sex belonging to the same species. Offsprings can be formed from a single parental organism. II. This type of reproduction is completed through cell division or through the production of spores. This type of reproduction is completed through the production of gametes and their union. III. Depends on amitosis, mitosis and meiosis. Depends on meiosis. IV. Variations are found in offsprings. The offsprings become identical to their parents. Options: (a) I, IV (b) II, III (c) III, IV (d) I, II

Explain the following two methods of asexual reproduction: (a) Budding (b) Regeneration

Explain the alternation of generation in Fern with the help of a word diagram.

Show the alternation of generation in fern with the help of a word diagram. OR Show the process of sexual reproduction in flowering plants with the help of a word diagram.

How is micropropagation performed? Which phenomena occur during telophase stage of mitosis in an animal cell? [3 + 2]

In DNA, which of the following base pairs is correct? (a) A—T (b) A—T (c) G = C (d) G—C

Compare the steps of mitosis in plant cells and animal cells and select which are correct: Mitosis in plant cell Mitosis in animal cell I. Spindle is formed from the cytoplasm. I. Spindle is formed from centrioles or asters. II. Cytokinesis occurs by cell plate formation. II. Cytokinesis occurs by cleavage furrow formation. III. Centrosomes are not involved. III. Centrosomes form from centrioles and are involved in mitosis. IV. Division of cytoplasm occurs through the formation of a cell plate. IV. Division of cytoplasm occurs through furrow formation. Which are correct? (a) I, IV (b) II, IV (c) II, III (d) III, IV

Which of the following statements is NOT correct? (a) Fibrin helps in blood clotting. (b) Platelets stop bleeding; many platelets reach the site of injury and begin the process of blood clotting. (c) Insulin increases the level of glucose in blood. (d) Adrenaline helps to increase heartbeat.