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

Grafting is employed for better and quicker yield of good varieties of

  1. Apple

  2. Citrus

  3. Mango

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

Apple, citrus, and mango all are dicots so they can be easily propagated by the technique of grafting. By grafting these plants gives better and quicker yield because for grafting one plant is selected for its roots and this is called the stock or root stock. The other plant is selected for its stems, leaves, flowers, or fruits and is called the scion. The stock and scion are selected from the plants which provides good yield so that it gets transferred to the grafted plant.

So, 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

The stem branch used in layering is the

  1. Upper branch.

  2. Young branch.

  3. Soft basal branch.

  4. Hard basal branch.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The development of roots on a stem while the stem is still attached to the parent plant is called layering. The heavy and closely branched stems of trees like fruit producing trees can be layered by the method of mound layering. The plants are cut near the soil level when they are not growing. Dormant buds on stem produce new shoots in spring. The new shoots are soft basal branches of the stem. When these shoots are covered with mound of soil they grow roots at the bases of shoots.

Covering of shoots helps in etiolation. Etiolation is the formation of plant parts or roots in absence of light.
Thus, 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

A quicker regeneration of grass leaves shall occur by

  1. Cutting

  2. Grazing

  3. Irrigation

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

Grass possess intercalary meristem at the base of the leaf blades. Intercalary meristems are capable of cell division, and they allow for rapid growth and regrowth of many monocots. In grass the meristem allows the damaged leaves to grow rapidly. Therefore, clipping of leaves at the base helps in quicker regeneration of grass leaves.

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

Grafting is not possible in monocots as they

  1. Lack cambium.

  2. Are herbacous.

  3. Have scattered vascular bundles.

  4. Have parallel venation.
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 is not possible in monocots as they lack cambium and the joining of vascular tissues between the scion and rootstock do not take place.
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

Which one of the following is not a natural method of vegetative propagation

  1. Runner

  2. Foliar buds

  3. Stem tuber

  4. Grafting
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Runner, foliar bud, and stem tuber is a natural method of propagation while grafting is an artificial method as because the two plants of different species are allowed to merge by artificial technique.
A runner is the stem portion of the plant that tends to grow horizontally as opposed to upright like the main stem. The end tip of the runner can produce buds that develop into new plants that are clones. Adventitious roots are also produced from the buds found on the runner. An offset is a short thick runner like branch which produces a new plant at its tip. The offsets grow in all directions from the main stem of the parent plant. 
Foliar buds are the buds which are present other than the node generally on the leaf. Plants like Begonia are propagated by the foliar bud.
Tubers are the underground modification of stem which stores starch. It has buds on its surface which help in the growth of the new plant as this buds are meristematic in nature. The buds are also known as eye. 
Grafting is not a natural method of vegetative propagation. It 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.
So, 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

Artificial vegetative propagation of mango varieties such as Dussehri and Alphanso is carried out through

  1. Bud grafting

  2. Scion grafting

  3. Mound layering

  4. Aerial layering
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bud grafting is the standard commercial method for propagating specific mango varieties to ensure the offspring retain the parent's characteristics.

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

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

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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'

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

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

  1. Layering

  2. Bud grafting

  3. Budding

  4. Stem cutting
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. Micropropagation

  2. Seed germination after gamma-irradiation

  3. Stem or Shoot up culture

  4. Seed germination under aseptic condition
Reveal answer Fill a bubble to check yourself
A Correct answer
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 ' .