Tag: common modes of vegetative propagation

Questions Related to common modes of vegetative propagation

Some leaves are removed from the stem cuttings 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 cuttings

  3. To reduce water loss

  4. Because the cuttings need less food

Show answer
Correct Option: C
Explanation:

A few leaves from the stem cutting are removed so as to reduce transpiration which inturn will reduce the water stress on the stem cutting and would help in faster rooting.

So, the correct answer is 'To reduce water loss'

Which of the following methods is used to produce new rose plants?

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

  1. Layering

  2. Bud grafting

  3. Budding

  4. Stem cutting

Show answer
Correct Option: D
Explanation:

Rose plant is cultivated by stem cutting. This is an asexual method of reproduction. Good stems are selected and dipped in auxin hormone that promotes root formation. These stems are then planted in a medium to obtain plants that are genetically identical to the parent plant. Thus the correct answer is option D.

The best way to obtain bacterial and viruses free plants through tissue culture

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

  1. Micropropagation

  2. Seed germination after gamma-irradiation

  3. Stem or Shoot up culture

  4. Seed germination under aseptic condition

Show answer
Correct Option: A
Explanation:

Tissue culture is the artificial growth of cells in a large amount in laboratory conditions. Micropropagation is one of the techniques of tissue culture in which a large number of desired cells are produced to obtain pathogen free bacteria and also small pieces of shoot meristems are cut and then transferred to culture media to grown, the resultant plants will be free from virus and bacterial infection. The media and surrounding should be sterilized and aseptic conditions should be maintained.

So , correct option is ' Micropropagation ' .

Which of the following cannot serve as a vegetative propagule?

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

  1. A piece of potato tuber with eyes

  2. A middle piece of sugarcane internode

  3. A piece of ginger rhizome

  4. A marginal piece of Bryophyllum leaf

Show answer
Correct Option: B
Explanation:
Vegetative propagation is a mode of asexual reproduction in which new offspring is obtained from the vegetative parts of the plant, such as runners, rhizomes, tubers, etc. These structures are known as vegetative propagules. 
Node is the vegetative propagule in sugarcane. 
So, the correct option is 'A middle piece of sugarcane internode'. 

Grafting is the union between two plants of closely related varieties. Following are some statements regarding different types of grafting
(i) An oblique cut followed by a notch is given to both stock and scion.
(ii) Scion is a bud with a small piece of bark and cambium.
(iii) Both stock and scion are of the same diameter.
(iv) The stock has many times more diameter than Scion.
Identify the type of grafting with respect to these statements and select the correct option.

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

  1. (i) can be tongue grafting in which diameter of stock is larger than that of scion

  2. (ii) can be bud grafting in which stock of monocot and scion of dicot plant are usually united

  3. (iii) can be wedge grafting in which v-shaped notch is given to stock whereas wedge like cut is given to scion

  4. (iv) can be crown grafting in which many stocks are inserted in the slits made in the scions

Show answer
Correct Option: C
Explanation:

In the tongue grafting, an oblique cut followed by a notch is given to both the stock as well scion. The two perfectly fit upon one another, they are tied together. Stock and scion are of the same diameter. In bud grafting, the scion is a bud with a small piece of bark and cambium. Monocots do not possess cambium, thus the two plants taken can be dicots only. In wedge grafting, the V-shaped notch is given to stock while the wedge-like cut is given to Scion. Both are also of the same diameter. In crown grafting, many scions are selected and shaped at the base to form a wedge. Many slits are formed on the sides of the stock. Scions are inserted in the slits and bandaged. The stock has a large diameter than Scion.

By which of the following method reproduction hybrids can be produced?

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

  1. Cutting

  2. Grafting

  3. Layering

  4. None of these

Show answer
Correct Option: B
Explanation:

Grafting technique can be used to produce hybrids. In grafting, the vegetative parts of two plants are joined and allow to grow as a single plant. In grafting, the upper (shoot) portion of one plant is allowed to grow on the lower (root) portion of another plant. This process results in the formation of new hybrids.

Buds arising at any part other than stem as known as

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

  1. Apical bud

  2. Axillary bud

  3. Adventitious bud

  4. Accessory bud

Show answer
Correct Option: C
Explanation:

(A)An apical bud is the one that is at the end of the shoot.

(B)Axillary bud is the one that is located on the axil of the leaf.
(C)Adventitious bud is the one that is developed from parts other than the shoot.
(D)The accessory bud grows near and in addition to the axillary bud.
So, the correct answer is 'Adventitious bud'

Find out wrong sequence.

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

  1. Grass - runner

  2. Mango - grafting

  3. Citrus - adventive embryony

  4. Bamboo - grafting

Show answer
Correct Option: D
Explanation:

Runner is a modified stem which grows horizontally forward creeping on ground and producing roots at nodes. Common example of plants producing runners are grasses like Cynodon, Oxalis etc.
Grafting is a method of artificial vegetative propagation. It is usually practiced in dicots (like rose, mango etc) and cannot be done in monocots (like sugarcane, bamboo, banana etc) because in monocots vascular cambium is absent.
Adventive embryony is a type of agamospermy in which the gametophytic generation is completely eliminated. The zygotic embryo either degenerates or competes with apomictic embryos. Adventive embryony usually leads to the formation of more than one embryo in a seed. Well known examples of adventive embryony are citrus, cactaceae, euphorbiaceae, orchidaceae etc.

Budding and fission are processes used by-

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

  1. Diocious species.

  2. Hermaphroditic organisms.

  3. Organisms requiring new gene combinations for each generation.

  4. A sexually reproducing species.

Show answer
Correct Option: D

Write the most appropriate answer from the given options. 
Vegetative reproduction yield can be increase by......

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

  1. Grafting

  2. Cutting

  3. Leaf propogation

  4. Rooting

Show answer
Correct Option: A
Explanation:

Grafting is the process of joining two plants together to grow as one. Grafting increases vegetative reproduction.

So, the correct option is 'Grafting'.