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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
A student has to focus his compound microscope to observe a prepared slide showing different stages of binary fission in Amoeba. The steps he is likely to follow are listed below in a haphazard manner:
I. Adjust the diaphragm and the mirror of the microscope so that sufficient light may enter to illuminate the slide.
II. Fix the slide on the stage carefully.
III. Adjust the microscope to high power and focus.
IV. Adjust the microscope to low power and focus.
The correct sequence of the above steps to observe the slide under the microscope is
(A) I, II, IV, III
(B) II, I, IV, III
(C) II, IV, I, III
(D) I, IV, II, III
Explain the process of regeneration in Planaria.
Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?
Fill in the following blank with suitable word :
Rose plants and sugar cane crop are usually grown by the ........... method.
Explain how new Bryophyllum plants can be produced from the leaves of the old plant. Illustrate your answer with the help of a labelled diagram.
What is a 'cutting' in respect of plants for propagation purposes?
Mention the common method of reproduction in Mango.
A student after observing a slide showing different stages of binary fission in Amoeba draws the following diagrams. However these diagrams are not in proper sequence:
The correct sequence is:
(A) I, V, IV, III, II
(B) I, III, IV, V, II
(C) I, V, III, IV, II
(D) I, IV, V, III, II
Which of the following is a mode of asexual reproduction?
Name the asexual reproductive structure of Chlamydomonas.
