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प्रश्न
Write a short note.
Budding in Hydra
उत्तर
- In Hydra, under favourable conditions, the regenerative cells of body wall are used for reproduction in the process of budding.
- When Hydra reaches maturity, the body wall begins to form an outgrowth from the stalk of the adult. It is called bud. This bud develops into a young Hydra.
- The dermal layers and the digestive cavity of the young Hydra are continuous with that of the parent Hydra. The young Hydra gets nourishment from the parent.
- When the young Hydra is sufficiently developed, it breaks off from the parent Hydra. Then, it leads an independent life.
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संबंधित प्रश्न
One of the following does not reproduce by spore formation method. This is :
(a) Rhizopus fungus
(b) Penicillium fungus
(c) Yeast fungus
(d) Mucor fungus
Observe the following picture and describe the type of reproduction shown in.
In the following figure, explain how new fungal colonies mucor are formed: 
Short answer question.
Write a note on budding in Hydra.
Short answer question.
Explain the different methods of reproduction occurring in sponges.
What is lactation? Which hormone is responsible for its regular secretion?
Amoeba : fission : : Hydra : ____________
Define.
Regeneration
Read the following paragraph and write the answers to the questions based on it.
Reproduction is an important process for the survival of an organism. Asexual reproduction occurs in different ways in plants. E.g. Vegetative propagation, fragmentation, budding, spore formation etc. Gametes are formed for sexual reproduction. In the animal kingdom, various methods like budding, binary fission, and parthenogenesis are used. There is no difference between males and females in the animals in which these methods are observed. The method of regeneration also creates new organisms. But regeneration is not the real method of reproduction. Regeneration is the process of healing wounds, creating new organs. This ability has completely disappeared in the developed animals. Modern research is being done on the method of sexual reproduction, e.g. Cloning. So, in the future women will be able to create their own offspring without a father.
- How do living organisms maintain their own species continuity?
- What are the methods of asexual reproduction in animals?
- Why is it said that regeneration is not the real method of reproduction?
- What are the different methods of reproduction in plants?
- What modern breeding methods are being researched in developed animals?
Mention the different types of asexual reproduction.
Explain the methods of asexual reproduction.
Reproduction by budding takes place in
Although 2 cells called gametes fuse, the product formed is a single cell called zygote. Justify.
Fill up the blanks with the terms given below :
| body | asexual | binary | single | nucleus |
Amoeba is a ______ celled organism. It reproduces by ______ reproduction.
The process of reproduction begins by the division of its ______ into two.
This is followed by the division of its ______ into two. This type of reproduction is called ______ fission.
Gemmule formation in sponges is useful in ______
There are thorns of calcium carbonate on the body of the animal named ______.
Budding in Hydra is a form of ______.
What is cryptorchidism?
