Tag: common modes of vegetative propagation

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

Grafting is not successful in monocots but is successful in dicots because they have

  1. Vascular bundles arranged in a ring

  2. Cambiurti for secondary growth

  3. Vessels with elements arranged end to end

  4. Cork cambium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Grafting is not successful is monocots but is successful in dicots because monocots lack cambium tissue which forms secondary growth. The cambium possesses the ability to form secondary xylem and phloem. It is present in dicots. In case of grafting, it is very important that the plant should form primary and secondary tissue for its survival. So, it take place only in dicots.

So, the correct answer is option B.

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

........... is the most convenient and cheap method of artificial vegetative propagation.

  1. Grafting

  2. Budding

  3. Cutting

  4. Micropropagation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Cutting is the most convenient and cheap method of artificial vegetative propagation because it doesn't require any skilled trained technique and it is not affected by contamination. On the other hand, the technique like grafting and budding requires skilled hand while micropropagation is highly sensitive to contamination and requires skilled hand.
Grafting is a horticulture technique where the living detached portion of the plant are used to regenerate the growth. 
Budding is a type of asexual reproduction which do not involve fusion of gametes. A new organism develops from an outgrowth or bud due to cell division at one particular site. The bud remains attached to the parent plant and separates after it gets mature. It leaves a scar at the point of separation. 
Cutting is a technique where the vegetative part is used for the propagation of plant. Cuttings are meristematic in nature so it can easily grow into a new plant.
Micropropagation is the process of multiplication and maintenance of genetically modified or hybrid plant. 
So, the correct answer is option C.
Multiple choice botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

Micropropagation production of

  1. True to type plants

  2. Haploid plants

  3. Somatic hybrids

  4. Somaclonal plants
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Micropropagation is the process of production of similar plants or clones. It is also used to provide a sufficient number of plantlets for planting from a stock plant which does not produce seeds or does not respond well to vegetative reproduction. The step of micropropagation includes:
1) The plant which needs to be propagated is chosen.
2) The plant part which has to be used as an explant is chosen. It can be the pollen, leaf, stem etc of the stock plant.
3) The explant is surface sterilized.
4) Culture the explant on a nutrient media.
5) After growth of root and shoot, it undergoes hardening treatment where it is grown under temperature available on fields to prepare them for growth.
6) In the final stage of plant micropropagation, the plantlets are removed from the plant media and transferred to the soil.
So, the correct answer is option A.
Multiple choice botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

Identify the correct statement

  1. Because of marked climatic variations, plants growing near the sea shore do not produce annual rings

  2. The age of the plant can be determined by its height

  3. Grafting is difficult in monocot plants as they have scattered vascular bundles

  4. Healing of damaged tissue is because of activity of sclerenchyma cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Grafting is a horticulture technique where the living detached portion of the plant are used to regenerate the growth. One plant is selected for its roots and this is called the stock or rootstock. The other plant is selected for its stems, leaves, flowers, or fruits and is called the scion. 
Grafting is not possible in monocots as they lack cambium and the joining of vascular tissues between the scion and rootstock donot take place and the vascular bundles are scattered.
So, the correct answer is option C. 
Multiple choice botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

In grafting, stock is

  1. Stem of desired variety

  2. Bud of desired variety

  3. Part of rooted plant

  4. Part to be grafted
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Grafting is a horticulture technique where the living detached portion of the plant is used to regenerate the growth. One plant is selected for its roots and this is called the stock or rootstock. The other plant is selected for its stems, leaves, flowers, or fruits and is called the scion. The joining of scion and stalk is known as inosculation. The technique is mostly used in an asexual mode of reproduction. 
So, the correct answer is option C.
Multiple choice botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

Plants with poor root system are propagated through

  1. Layering

  2. Leaf cuttings

  3. Stem cuttings

  4. Grafting
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plants with poor root system are propagated through grafting. Grafting is a horticultural technique whereby tissues of the plant are joined so as to continue their growth together. The two plants are selected, one with good roots called rootstock and another with good flowers, fruits, leaves or stem called scion. The scion contains the desired genes to be duplicated. The plants with poor roots but with the desired  quality of other products are used as scion and grafted on plants with good mature roots.

Thus, the correct answer is option D.

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

Plants of desired qualities are produced by

  1. Cutting

  2. Grafting

  3. Layering

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In grafting, we join two plants to each other. The upper part of the graft is called scion that forms the top portion of the plant, and lower part which we call understock makes roots or part of the stem. Grafting is usually joining of only two plants but it may be a combination of several. If we join a third plant between two plants then it forms the trunk or a portion of it. This third plant  is called an interstem.

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

What is the best time for growth of cuttings

  1. Summer

  2. Winter

  3. Spring

  4. Both spring and rainy season
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cutting is a technique where the vegetative parts which are meristematic in nature is used for propagation so it can easily grow into a new plant. The best time for the growth of cutting is summer because cuttings are very delicate and are prone to fungal growth. In summers the chances of fungal growth are rare as there is least humidity.

So, the correct answer is option A.

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

Grafting is the art of joining parts of plants such that they grow as one plant. What is the name given to the part of the graft which gives rise to the upper portion?

  1. Bud

  2. Stock

  3. Scion

  4. Meristem
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Grafting and budding are horticultural techniques used to join parts from two or more plants so that they appear to grow as a single plant. In grafting, the upper part (scion) of one plant grows on the root system (rootstock) of another plant. In the budding process, a bud is taken from one plant and grown on another. So, the correct option is "C" (Scion).

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

Grafting results in

  1. Mixing of traits of two varieties without resorting to hybridisation

  2. Providing hormones and stimulating chemicals from stock to scion

  3. Quick growth of desirable variety with poor root system

  4. All the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Grafting is a horticulture technique where the living detached portion of the plant is used to regenerate the growth. One plant is selected for its roots and this is called the stock or rootstock. The other plant is selected for its stems, leaves, flowers, or fruits and is called the scion. The joining of scion and stalk is known as inosculation. 

Grafting involves mixing of traits of two varieties without resorting to hybridization as because stock and scion belong to two different plant species. The vegetative part is developed by the scion so fruit, flowering, branching, and leaves pattern depends on scion while the root pattern is influenced by the genome of the stock.
So, the correct answer is option A.