What do you understand by vegetative methods of reproduction ? Ex

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71. Explain the significance of fertilization.
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72. What do you understand by vegetative methods of reproduction ? Explain with examples


Vegetative propagation is defined as formation of two or more new offsprings from any vegetative part of plant. in Vegetative Propagation parts like Rhizome , buds, tuber , leaves , roots and stem give rise to new plants . these parts are called as Vegetative propagules It is very rapid method.

It is of two types :

A. Natural Vegetative propagation

1. Vegetative propagation by stem. e.g. grasses, turmeric, onion, colocasia, potato, gladiolus and crocus.

2. Vegetative propagation by roots. e.g., Tuberous roots of sweet potato, asparagus, tapioca, dahlia and yams (Dioscorea).

3. Vegetative propagation by leaves e.g. Bryophyllum, Begonia, Lilium.

4. Vegetative propagation from reproductive organs. Flower buds of century plant (Agave sp.) develop into bulbils.

B. Artificial vegetative propagation.

1. Cutting e.g. leaf cutting in Bryophyllum.

2. Layering e.g. Jasmine.

3. Grafting e.g. Rose, Mango.

4. Micro-propagation.

5. Gootee e.g. lemon, orange, guava, litchi

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73. Describe the importance of vegetative propagation.
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 Multiple Choice QuestionsShort Answer Type

74.

Which is a better mode of reproduction: sexual or asexual? Why?

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75.

Explain why meiosis and gametogenesis are always interlinked?

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76.

Describe the post-fertilisation changes in a flower.

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77.

Examine a few flowers of any cucurbit plant and try to identify the staminate and pistillate flowers. Do you know any other plant that bears unisexual flowers?

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78.

Why are offspring of oviparous animals at a greater risk as compared to offspring of viviparous animals?

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79.

Give an example of an organism that enters 'diapause' and why.

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80.

Why do algae and fungi shift to sexual mode of reproduction just before the onset of adverse conditions?

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