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प्रश्न
Distinguish between sexual and asexual reproduction.
उत्तर
| Asexual reproduction | Sexual reproduction | |
| i. | Reproduction that occurs with the help of somatic cells is called as asexual reproduction. | Reproduction that occurs with the help of two germ cells is called sexual reproduction. |
| ii. | This is uniparental reproduction, thus both male and female parent are not necessary | Male and female parents are necessary for sexual reproduction. |
| iii. | This reproduction occurs with the help of mitosis only. | This reproduction involves both mitosis and meiosis types of cell division. |
| iv. | The new individual formed by this method is genetically identical to its parent. | New individual formed by this method is genetically different from parents. |
| v. | Asexual reproduction occurs in different individuals by various methods like binary fission, multiple fission, budding, fragmentation, regeneration, vegetative propagation, spore formation, etc. | In all individuals, sexual reproduction occurs by gamete formation and fertilization. |
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संबंधित प्रश्न
Name two simple organisms having the ability of regeneration.
How the process of regeneration in Planaria process different from reproduction?
List two advantages of vegetative propagation.
How will an organism be benefited if it reproduces through spores?
How does Plasmodium reproduce. Is this method sexual or asexual?
Fill in the following blanks with suitable words :
Plasmodium reproduces by the process of ............ fission whereas Paramecium reproduces by the process of ......... fission.
Fill in the following blank with suitable word :
Vegetative reproduction of potato plants is done by using ............
Explain why, more complex multicellular organisms cannot give rise to new organisms through regeneration.
Describe the layering method for the artificial propagation of plants. Illustrate your answer with the help of a labelled diagram. Name any five plants which are propagated by the layering method.
What is meant by the term 'fission' as used in biology?
Name one commonly used vegetable which is propagated by using tubers.
Vegetative propagation involves the growth and development of 'something' present in the old part of the plant to form a new plant. What is this 'something'?
What is the difference between the two asexual methods of reproduction : fission and fragmentation?
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
The two types of organisms which produce colonies by the process of budding are :
(a)Hydra and Corals
(b) Yeast and Sponges
(c) Corals and Sponges
(d) Hydra and Yeast
An organism which can reproduce by two asexual reproduction methods one similar to the reproduction in yeast and the other similar to the reproduction in Planaria is :
(a) Spirogyra
(b) Bryophyllum
(c) Hydra
(d) Sea anemone
A small part of the shoot of a plant is removed with a sharp knife. When the lower end of this small part of the shoot is buried in moist soil, it gradually develops roots and shoots and grows to become a new plant.
(a) What is the name of this method of propagating plants?
(b) What care should be taken while removing a small part of the shoot from the parent plant with a knife?
(c) Name any two plants which provide us with food directly or indirectly and are grown by this method.
(d) Give one advantage of this method of producing new plants.
(e) State whether it is a sexual method of reproduction or an asexual method. Why?
(f) What special name can be given to the genetically identical new plants produced by this technique?
Fill in the following blank with suitable word :
Fusion of gametes gives rise to a single cell called ............
Write a short note on Micro propagation.
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
Define the following:
Binary fission
Mention the common method of reproduction in Spirogyra.
Mention the common method of reproduction in Ginger.
Mention the common method of reproduction in Gladiolus.
Explain the process of budding in Hydra.
Choose the correct statement(s) on budding in yeast from the following :
I. A parent cell divides into two or more daughter cells and here the parent identity is lost.
II. In this the elongated nucleus divides to form two or more daughter nuclei.
III. A bud arises from a particular region on a parent body.
IV. After detaching from the parent body the bud grows into a new independent individual.
(A) I only
(B) III only
(C) II and III only
(D) III and IV only
Name the following :
Explain the structure and the function of the structures released from the ‘blobs’ in Rhizopus.
After observing the prepared slides of binary fission in Amoeba and budding in yeast following observations were reported:
(a) Single cells of Amoeba and yeast were undergoing binary fission and budding respectively.
(B) Cytokinesis was observed in the yeast cell.
(C) Elongated nucleus was dividing to form two daughter nuclei in Amoeba.
(D) A chain of buds were observed due to reproduction in Amoeba.
The correct observation(s) is/are:
(A) a and c
(B) b only
(C) c and d
(D) d, a and c
Which of the following is a mode of asexual reproduction?
What is meant by vegetative propagation? Name the vegetative parts through which Potato and Bryophyllum reproduce.
Define vegetative propagation. List its two methods.
Name the parts of the plants used to grow following flower: Dahlia
Name the parts of the plants used to grow following flower: Rose
Name the parts of the plants used to grow following flower: Gladiolus
Porogamy refers to entry of pollen tube through ____________.
Budding, in hydra, is a form of ______.
A feature of reproduction that is common to Amoeba, Yeast, and Spirogyra is that ______
Spirogyra reproduces by ______.
In Spirogyra, asexual reproduction takes place by
