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प्रश्न
Name two marine organisms which also reproduce by the same method as yeast but form colonies.
उत्तर
Sponges and corals are the two marine animals that reproduce by the same method as yeast; however, they form colonies.
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संबंधित प्रश्न
What is the name of asexual reproduction method in Spirogyra
Name one organism which reproduces by fission and another which reproduces by fragmentation.
What is the difference between the cuttings method and grafting method for the artificial propagation of plants?
Binary fission describes the type of reproduction where the organism divides to form :
(a) many spores
(b) two daughters
(c) many buds
(d) two hyphae
The cut part of a plant stem (without roots) which is used in grafting is called :
(a) stock
(b) stump
(c) scion
(d) graft
The stem of a fruit tree X fixed in soil is cut in a slanting way. The upper part of stem of another fruit tree Y of different variety of same species is also cut in a slanting way. The cut stem of tree Y, without roots but having some leaves, is placed over the rooted cut stem of tree X in such a way that their cut surfaces fit together properly. While joining the two cut stems, care is taken to make sure that the layer Z of one cut stem is in contact with layer Z of the other cut stem. The joint of cut stem is bound tightly with a piece of cloth and covered properly with polythene. Soon the cut heals and the two stems grow together and become one fruit tree producing leaves, flowers and fruits.
(a) What is the name of this method of producing plants or trees?
(b) What name is given to the cut stem of tree X having roots?
(c) What name is given to the cut stem of tree Y which has no roots but has some leaves?
(d) Name the layer Z.
(e) Why should the layer Z of one cut stem be in contact with the layer Z of the other cut stem?
(f) Name any four fruit trees which are usually bred by this technique.
(g) State any one advantage of producing fruit trees by this technique.
Fill in the blank:
Binary fission produces cells of ________ size.
How is micropropagation carried out?
In the diagram given in Figure 12.2 label the parts marked (a), (b) and (c).
Which of the following options shows two plants in which new plantlets arise from the same organ?
