Tag: asexual modes of reproduction

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Questions Related to asexual modes of reproduction

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.

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

If you take the scion of desi mango and stock of dasheri mango, what type of mango will be produced?

  1. Desheri

  2. Desi

  3. Hybrid

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The grafted branches present will give rise to dasheri mangoes whereas the rest of the branches will give rise to desi mangoes.

So, the correct option is 'Desi'.

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

In grafting process 

  1. Desirable characters of stock are transferred to scion

  2. Desirable characters of scion are transferred to stock.

  3. Desirable characters of both stock & scion are transferred to new bud

  4. Character transfer is not possible.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Grafting is a horticultural technique 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 this process, desirable characters of scion are transferred to stock because the stock being root system cannot be uprooted as it decreases the survival rate.
So, the correct option is 'Desirable characters of scion are transferred to stock'.
Multiple choice botany reproduction in angiospermic plants artificial vegetative propagation common modes of vegetative propagation vegetative propagation asexual modes of reproduction

The vegetative own in the where a branch is injured defoliated and pegged down in the ground is known as

  1. Layering

  2. grafting

  3. cutting

  4. bud grafting
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
In this method, the lower branch of the stem is bent down and partially defoliated. An injury is made in the defoliated portion. The injured and defoliated portion is covered with a light layer of moist soil in such a way that the growing tip of the branch remains above the soil surface. After a few days, the pegged portion develops adventitious roots. The rooted branch is then cut, separated from the parent plant and grown into a new plant. Examples - Jasmine, Grapevine, Strawberry, Raspberry, Cherry, etc.
So the correct option is 'Layering'.