Tag: asexual modes of reproduction

Questions Related to asexual modes of reproduction

During grafting rootstock is generally derived from a plant 

botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

  1. Efficient in water and mineral absorption

  2. Resistant to diseases

  3. That grows strong and healthy branches

  4. All of the above

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Correct Option: D
Explanation:
Grafting is a technique of combining two parts of plants so that they grow together. This allows combining the qualities of a strong, healthy, disease-resistant plant with the qualities of another plant usually one that produces good fruit or attractive flowers. The properties desired to be propagated are obtained from the rootstock, therefore, the plants that undergo this process should be efficient in water and mineral absorption as the rootstocks absorb more water and ions than the self-rooted plants and it must be resistant to diseases and should grow strong and healthy branches.
So, the correct answer is option D.

The fusion of stems of two different plants is seen in the case of  

botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

  1. Grafting

  2. Layering

  3. Cutting

  4. All of the above

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Correct Option: A
Explanation:

Grafting is a method in which the cut stems of two different plants (one with roots and other without roots) are joined together in such a way that the two stems join and grow as a single plant. This new plant will have the characteristics of both the original plants.

Grafting of tissue or organ between individuals of different species is known as

botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

  1. Autograft

  2. Isograft

  3. Xenograft

  4. Allograft

  5. Intergraft

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Correct Option: C

Some leaves are removed from the stem cutting planted for vegetative propagation. This is done

botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

  1. To increase water uptake

  2. Because it helps in rooting of cutting

  3. To reduce water loss

  4. Because the cutting need less food

Show answer
Correct Option: C
Explanation:

Water is lost through stomata in leaves. If leaves are removed water can be conserved for other physiological processes.

Largest bud is of

botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

  1. Cabbage

  2. Cauliflower

  3. Agave

  4. Onion

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Correct Option: A

In Passiflora, the tendrils are modified

botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

  1. Axillary buds

  2. Upper leaflets

  3. Whole leaves

  4. Stipules

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Correct Option: A

Which of the following depends on man for its cultivation and will vanish without men's help

botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

  1. Rice

  2. Maize

  3. Wheat

  4. Potato

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Correct Option: B

Blackberry is multiplied by

botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

  1. Stem cuttings

  2. Bulbils

  3. Leaf cuttings

  4. Root cuttings

Show answer
Correct Option: D
Explanation:

Blackberry can be multiplied by root cuttings. Cutting is one of the methods of artificial propagation. Plants with fleshy roots and trees and shrubs that produce suckers are suitable for this method of propagation. These cuttings don’t need humid conditions as they don’t have leaves to lose water. A piece of root with dormant buds is placed in a suitable medium such as moist soil. If the conditions are suitable, the piece will grow into the new independent plant, a process known as striking. The new plants thus produced resemble the parent plant. Commercial crop grower takes advantage of the cloning which occurs after vegetative propagation to maintain the favourable traits and product quality. Root cutting is done when plants are dormant and have maximum energy stored in roots. 

Thus, the correct answer is option D.

A plant hormone that induces morphogenesis in plant tissue culture is

botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

  1. Abscisic acid

  2. Gibberellin

  3. Cytokinin

  4. Ethylene

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Correct Option: C
Explanation:

Cytokinin is a plant hormone which is involved in various physiological processes. It promotes growth of shoot buds. It also induces cell division and shoot and root morphogenesis. In plant tissue culture, it is applied externally to induce morphogenesis

Thus, the correct answer is option C.

Leaf and stem cuttings are sown

botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

  1. Vertically with morphological apical end upwards

  2. Vertically with morphological basal end upwards

  3. Laterally with morphological upper side upwards

  4. Laterally with morphological lower side upwards

Show answer
Correct Option: A
Explanation:

In leaf and stem cuttings, the explant is taken from the apical portion of leaf or stem as it has a meristematic cell which has active nucleus and cytoplasm. The meristematic cell divides rapidly when cultured on nutrient media and provides virus-free plant. When the apical portion of the leaf or stem culture is sown, it is sown vertically with morphological apical end upwards to ensure maximum growth by keeping the meristematic cell at the top.

So, the correct answer is option A.