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प्रश्न
…………. is a mode of asexual reproduction.
(a) Cloning
(b) Budding
(c) Pollination
(d) Germination
उत्तर
(b) Budding.
Cloning is a process by which an entire organism is reproduced in a genetically identical manner from a single cell taken from the parent organism. Pollination and germination are associated with sexual reproduction in plants.
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संबंधित प्रश्न
Name the part of Bryophyllum where the buds are produced for vegetative propagation.
What is the name of asexual reproduction method in Spirogyra
Name the artificial propagation mehod used for the propagation of apple trees.
Name the natural method by which strawberry plants are propagated.
What is meant by regeneration? Name two animals which can regenerate fully from their cut body parts.
Name three common methods which are used for the artificial propagation of plants.
How does binary fission differ from multiple fission?
What is name of the organ of propagation present in a tuber?
Name two organisms which reproduce by the same asexual process as that of Amoeba.
Name the method by which bread mould (Rhizopus fungus) reproduces. Is this method sexual or asexual?
A simple multicellular animal having tentacles which lives in freshwater usually reproduces by the asexual process of :
(a) binary fission
(b) spore formation
(c) budding
(d) fragmentation
One of the following organisms does not reproduce by fission. This is :
(a) Amoeba
(b) Leishmania
(c) Planaria
(d) Plasmodium
The ability of a cell to divide into several cells during reproduction in Plasmodium is called :
(a) budding
(b) fragmentation
(c) binary fission
(d) multiple fission
Spore formation is the most common asexual method of reproduction in :
(a) protozoa
(b) tubers
(c) fungi
(d) algae
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 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.
When a broken piece of the stem of a plant X is planted in the soil, a new plant grows from it in a week's time. The leaves of plant X also have many small entities Y in their margins which can fall to the ground alone or alongwith leaves and grow into new plants.
(a) Name a plant which X could be.
(b) What are the entities Y present on the leaves of X known as?
(c) Name a plant other than X which can be reproduced from its leaves.
(d) Name a common plant grown in many homes which can be propagated from its broken stems like plant X.
(e) Name a kind of dormant organs present in dry stems of old grass plants lying in the fields which get activated and produce green grass plants after the rains.
Fill in the blank:
Yeast cells reproduce by ________.
Fill in the blank:
Binary fission produces cells of ________ size.
State whether the following statement IS true (T) or false (F):
Asexual reproduction is more common than the sexual reproduction.
Differentiate between the following:
Binary fission and budding
Mention the common method of reproduction in Ferns.
Mention the common method of reproduction in Ginger.
A yeast cell in which budding occurs was seen to have:
(1) one bud cell
(2) two bud cell
(3) three bud cell
(4) a chain of bud cells
Name the mode of reproduction process seen in yeast.
Rewrite the following statement by selecting the correct option.
When Hydra becomes matured, _________ takes place in it.
Draw a labelled diagram in proper sequence to show budding in hydra.
What is protandry?
Distinguish between the following.
Binary fission and Multiple fission
A piece of wet bread or bhakri kept in a humid place for 2-3 days, then
- What will you observe?
- State the scientific name of the living organism and write its characteristics.
Identify the reason because of which cambium is essential for grafting in plants.
A feature of reproduction that is common to Amoeba, Yeast, and Spirogyra is that ______
In the diagram given in Figure 12.2 label the parts marked (a), (b) and (c).
In an asexually reproducing species, if a trait X exists in 5% of a population and trait Y exists in 70% of the same population, which of the two trait is likely to have arisen earlier? Give reason.
When one of the following is correctly matched?
Match the columns:
| Column A (Asexual) | Column B (Examples) | ||
| (a) | Spore formation | (1) | Spirogyra |
| (b) | Conidia formation | (2) | Yeast |
| (c) | Fragmentation | (3) | Chlamydomonas |
| (d) | Budding | (4) | Penicillium |
