Asexual Reproduction
Asexual Reproduction
Asexual Reproduction: The type of reproduction that takes place without the process of gamete (sex cell) formation is called asexual reproduction. As only somatic cells are involved it is also called as somatogenic reproduction. This process is very common in unicellular organisms and is said to be the simplest type of reproduction e.g. binary fission in amoeba, budding in hydra, spore formation in Rhizopus and fungus, vegetative propagation in flowering plants like rose etc. This type of reproduction takes place commonly in lower plants and animals, where the body is not very complex. There are different forms of asexual reproduction :
1. Fission : In this type of reproduction whole body acts as a reproductive unit. The nucleus of the unicellular parent organism divides into two followed by division of cytoplasm, resulting in two daughter cells of almost equal size. It is commonly seen in Euglena, Ameoba. Depending on the number of division, fission can be binary fission, longitudinal fission and multiple fission.
2. Fragmentation :These organisms are formed of cells and tissues but lack differentiated specialised tissue and organs. Such organisms are produce by breaking of theri bodies into small pieces called fragments. Each fragment is capable of developing inot a complete organism. Example :flatworm, echinoderm,sea anemones, filamentous green algae .
3. Budding : It involves production of a new individual form an outgrowth or small projecrtion, from the parent, called a bud. It is commonly seen in yeast, some protozoans and ceratin lower organisms like Hydra and sponges.
4. Regeneration : This is the abiltiy of an organsim to regenerate its lost part of the body which has been removed as an injury or by autonomy. Eg : Planaria
5. Spore formation : it is a common method of asexual reproduction in fungi and bacteria. The spores are produced in specialised strructures called as sporangium in case of fungi. Non - motile and non - motile spores are called aplanospores while the motile and flagellated spores are called as zoospores. The spore are libertaed after rupturing of sporangial wall.
6. Vegetative reproduction : It is the method in which parts other than seeds are used as propagules . They are classififed as natural and artificial method.
There are several methods of natural vegetative propagation . They are By root tubes, By underground modified stems, By runners, node of potato, Rhizome of ginger, corn of banana and bulb of garlic and onion, by leaf etc.
Artificial Method :
These are man made and develpoed by plant growers and horticulturist for commercial prooagation of crops. Some common methods are Cutttiing, Layering, Grafting, Plant tissue culture etc.
seed for reproduction is not an example or feature of ______ | |||
| Right Option : A | |||
| View Explanation | |||
Roots of which of the following plants are invovlved in asexual reproduction? | |||
| Right Option : C | |||
| View Explanation | |||
Asexual reproduction through root is poosible in which of the following: | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [20]
My experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
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Yatharthi Sharma
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Barkha Arora
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Manish Kumar
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Cheshta
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
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Aman Kumar Shrivastava
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8thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
