Question 13 Marks
Name the figure given below. Identify label A and B. Explain its developemt.
Answer
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Questions
Answer the following questions in detail.
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8 questions · self-marked practice — reveal the answer and mark yourself.
Question 23 Marks
Sketch and label the T.S. of undehisced anther.
Question 33 Marks
Sketch and label V. S. of anatropous ovule.
Question 43 Marks
(a) Following are the diagrams of entry of pollen tube into ovule. Identify the type A and B.
(b) Give any four points of significance of double fertilization.
(b) Give any four points of significance of double fertilization.
Answer
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Question 53 Marks
What is artificial method of vegetative propagation? Describe: (i) cutting (ii) Budding
Answer
Vegetative Propagation is a type of asexual reproduction in which new plants form just by using some fragment of the parent plant.Artificial Method of vegetative propagation - The process of growing plants by using artificial methods is called artificial propagation. It is mainly of three types - Cutting, Budding, and Layering.
(i) Cutting - In this method, stems are cut into pieces and planted in the soil. This is the easiest and most frequently used method of artificially propagating plants, Eg. - Sugarcane, grapes, rose, etc.
(ii) Budding - Here a single bud instead of a branch is grafted on the stock. In about two weeks, the bud unites with the stock after which the stock just above the bud is cut off. Eg. - Lemon and hibiscus
View full question & answer→Vegetative Propagation is a type of asexual reproduction in which new plants form just by using some fragment of the parent plant.Artificial Method of vegetative propagation - The process of growing plants by using artificial methods is called artificial propagation. It is mainly of three types - Cutting, Budding, and Layering.
(i) Cutting - In this method, stems are cut into pieces and planted in the soil. This is the easiest and most frequently used method of artificially propagating plants, Eg. - Sugarcane, grapes, rose, etc.
(ii) Budding - Here a single bud instead of a branch is grafted on the stock. In about two weeks, the bud unites with the stock after which the stock just above the bud is cut off. Eg. - Lemon and hibiscus
Question 63 Marks
Differentiate between anemophily and entomophily.
Answer
View full question & answer→| Sr. No. | Anemophily | Entomophily |
| 1. | Wind pollinated flowers. | Insect-pollinated flowers. |
| 2. | The size of the flowers is small. | The size of the flowers is large or present in groups to show a conspicuous appearance. |
| 3. | Not brightly coloured. | Brightly coloured. |
| 4. | Odourless. | Usually, odour/fragrance is present. |
| 5. | Nectar is not produced. | Nectar or edible pollen is usually present. |
| 6. | The number of pollen grains produced in large quantities. | The number of pollen grains is less. |
| 7. | Stigma is branched or hairy. | Stigma is usually unbranched and sticky. |
| 8. | Pollination is non-directional. | Pollination is directional and highly specific. |
| 9. | Pollen grains are light and smooth. | Pollen grains are heavier and sticky. |
| 10. | e.g. grass, maize, etc. | e.g. jasmine, rose, etc. |
Question 73 Marks
Sketch and label T. S. of angiospermic anther.
Question 83 Marks
Sketch and label stages in development of angiospermic female gametophyte from functional megaspore.