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प्रश्न
How is plant hybridisation as a technique beneficial?
उत्तर
Plant hybridization is beneficial to us in the following ways:
- It is useful in obtaining clones and genetic experimental plants.
- It is a quick and convenient method.
- Hybrid plants are stronger than either parent plant in general and have a higher yield.
- Crop plants giving a much higher yield can be developed using this technique.
- Plants resistant to diseases, pests and climatic factors can be produced by hybridization with desired plants or wild species.
- The hybrid plants (especially ornamentals) have more colourful or fragrant flowers that enhance their commercial value.
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संबंधित प्रश्न
Name the asexual method of reproduction in Plasmodium.
Why does bread mould grow profusely on a moist slice of bread but not on a dry slice of bread?
Why do green grass plants spring up in dry fields on their own after the rains?
Name two fruit trees which are usually propagated by grafting method.
One of the following organisms does not reproduce by budding. This is :
(a) Sponge
(b) Yeast
(c) Hydra
(d) Planaria
Select the correct statements for the process of budding in yeast:
I. A bud arises from a particular region on a parent body.
II. A parent cell divides into two daughter cells, here the parental identity is lost.
III. Before detaching from the parent body a bud may form another bud.
IV. A bud when detaches from the parent body grows into a new individual.
(A) I, II and III
(B) II, III and IV
(C) III, IV and I
(D) IV, I and II
Name a multicellular organism which reproduces by fragmentation method.
The form of vegetative reproduction of plants where seeds are formed without fusion of gametes is called
Hydra usually reproduces by ______
In the diagram given in Figure 12.2 label the parts marked (a), (b) and (c).
