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प्रश्न
Explain the term Vegetative propagation.
उत्तर
When new plants are produced from the vegetative parts like roots, stems, leaves, and buds it is known as vegetative propagation.
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संबंधित प्रश्न
Name two simple organisms having the ability of regeneration.
Name the part of Bryophyllum where the buds are produced for vegetative propagation.
What is metamorphosis?
State two disadvantages of vegetative propagation?
A student in viewing under a microscope a permanent slide showing various stages of asexual reproduction by budding in yeast. Draw diagrams of what he observes (in proper sequence)
State whether the following statement is true or false :
Spores produced by the bread mould plant are actually its seeds.
Most of the plants reproduce by sexual method. Name two plants which can reproduce asexually.
Name the asexual method of reproduction in Plasmodium.
Explain vegetative propagation with the help of two examples. List two advantages of vegetative propagation.
Describe the grafting method for the artificial propagation of plants with the help of labelled diagrams.
One of the following reproduces by forming spores. This in :
(a) Fern
(b) Planaria
(c) Spirogyra
(d) Potato
The organisms which can reproduce by fragmentation are :
(a) Corals and Sponges
(b) Corals and Spirogyra
(c) sea anemone and Spirogyra
(d) Sponges and Sea anemones
There are four tiny organisms A, B, C and D. The organism A is a parasitic protozoan which causes a disease known as kala-azar. The organism B is a microscopic single-celled animal which causes malaria disease in human beings. The organism C is a unicellular animal which can change its body shape according to need, it has no fixed shape. The organism D is also a unicellular animal which is slipper-shaped having a large number of tiny hair all around its body.
(a) Name the organisms A, B, C and D
(b) Name one characteristic body feature of organism A.
(c) Name the insect which carries organism B and transmits it from one person to another.
(d) What name is given to the asexual method of reproduction of (i) organism A, and (ii) organism B?
(e) Where do organisms C and D live?
Write a short note on Micro propagation.
Multiple choice question. Tick (✓) the correct choice:
The common method of reproduction in bacteria is
- budding
- fragmentation
- binary fission
- all the above
Fill in the blank:
Amoeba reproduces by _________.
Fill in the blank:
Binary fission produces cells of ________ size.
State whether the following statement is true (T) or false (F):
Bacteria and yeast reproduce by sexual reproduction.
Define the following:
Tissue culture
Mention the common method of reproduction in Mucor.
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
Name a multicellular organism which reproduces by fragmentation method.
Complete the following chart:
| Asexual reproduction | Sexual reproduction | ||
| 1. | Reproduction that occurs with the help of somatic cells is called as asexual reproduction. | 1. | ____________ |
| 2. | ____________ | 2. | Male and female parent are necessary for sexual reproduction. |
| 3. | This reproduction occurs with the help of mitosis only. | 3. | ____________ |
| 4 | ____________ | 4. | New individual formed by this method is genetically different from parents. |
| 5 | Asexual reproduction occurs in different individuals by various methods like binary fission, multiple fission, budding, fragmentation, regeneration, vegetative propagation, spore production, etc. | 5. | ____________ |
In hydra the type of reproduction is ___________.
List in tabular form two differences between binary fission and multiple fission.
Name two flowering plants that reproduce both by seeds and by vegetative means.
Name four plants which can be propagated by stem-cutting.
How is plant hybridisation carried out?
How is vegetative propagation economically important?
Define.
Fragmentation
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
Draw a neat and labelled diagram.
Spore formation
By which of the following egg in female gametophyte is accompanied?
Offspring formed by asexual method of reproduction have greater similarity among themselves because
- asexual reproduction involves only one parent
- asexual reproduction does not involve gametes
- asexual reproduction occurs before sexual reproduction
- asexual reproduction occurs after sexual reproduction
In Rhizopus, tubular thread-like structures bearing sporangia at their tips are called
In the diagram of a bisexual flower given in Figure 12.5, draw the missing part and label the parts marked (a), (b) and (c). Also, label the missing part that you draw
When one of the following is correctly matched?
