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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
A student has to focus his compound microscope to observe a prepared slide showing different stages of binary fission in Amoeba. The steps he is likely to follow are listed below in a haphazard manner:
I. Adjust the diaphragm and the mirror of the microscope so that sufficient light may enter to illuminate the slide.
II. Fix the slide on the stage carefully.
III. Adjust the microscope to high power and focus.
IV. Adjust the microscope to low power and focus.
The correct sequence of the above steps to observe the slide under the microscope is
(A) I, II, IV, III
(B) II, I, IV, III
(C) II, IV, I, III
(D) I, IV, II, III
How does multiple fission occur in an organism? Explain briefly.
A tadpole develops into an adult frog by the process of ______.
What happens when Bryophyllum leaf falls on the wet soil?
Name the process by which an Amoeba reproduces. Draw the various stages of its reproduction in a proper sequence.
What is meant by regeneration? Name two animals which can regenerate fully from their cut body parts.
What is name of the organ of propagation present in a tuber?
How does an Amoeba reproduce? Describe the process of reproduction in Amoeba with the help of labelled diagrams of different stages in its reproduction process.
Describe the process of reproduction in Hydra with the help of labelled diagrams. What is the name of this process of reproduction?
What is yeast? Describe the process of reproduction in yeast with the help of labelled diagrams.
What is the difference between the cuttings method and grafting method for the artificial propagation of plants?
What is tissue culture?
The unicellular organism which reproduces by budding is :
(a) Spirogyra
(b) Hydra
(c) Planaria
(d) Yeast
The thread like structures that develop on a moist slice of bread in Rhizopus are ______.
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
State whether the following statement is true (T) or false (F):
Bacteria and yeast reproduce by sexual reproduction.
Mention the common method of reproduction in Mucor.
Mention the common method of reproduction in Mosses.
Mention the common method of reproduction in Dahlia.
Mention the common method of reproduction in Bougainvillea.
Describe the advantages of vegetative reproduction.
A student after observing a slide showing different stages of binary fission in Amoeba draws the following diagrams. However these diagrams are not in proper sequence:
The correct sequence is:
(A) I, V, IV, III, II
(B) I, III, IV, V, II
(C) I, V, III, IV, II
(D) I, IV, V, III, II
In which of the following figures is budding not shown?
(A) I
(B) II
(C) III
(D) IV
What is regeneration in organism?
A student was given two permanent slides, one of binary fission in Amoeba and other of budding in yeast. He was asked to identify any one difference in the nucleus of the two. One such difference, he identified correctly was
(1) Presence of one nucleus in Amoeba, two in yeast cell and one in bud.
(2) Presence of two nuclei in centrally constricted Amoeba, one in yeast cell and one in its bud.
(3) Presence of two distant nuclei in Amoeba, one in yeast cell and two in bud.
(4) Presence of a single nucleus each in Amoeba, yeast cell and its attached bud.
In hydra the type of reproduction is ___________.
Write four lines on the following: Layering
Name the parts of the plants used to grow following flower: Lily
How is plant hybridisation as a technique beneficial?
What is micropropagation?
Identify the type of reproduction from the following explanation and draw a neat and labelled diagram.
- The body of the parent organism breaks up into many fragments and each fragment starts to live as an independent new organism.
- Give two examples of living organisms which follow this type of reproduction method.
Distinguish between the following.
Binary fission and Multiple fission
Vegetative propagation by leaves takes place in ______.
A feature of reproduction that is common to Amoeba, Yeast, and Spirogyra is that ______
The ability of a cell to divide into several cells during reproduction in Plasmodium is called ______
In Spirogyra, asexual reproduction takes place by
Can you consider cell division as a type of reproduction in unicellular organism? Give one reason.
When you keep food items like bread and fruits outside for a long time, especially during the rainy season, you will observe a cottony growth on them.
What is this growth called?
