Biology

Plant Propagation Techniques

660 Questions

Plant propagation techniques cover both natural and artificial methods of cultivating plants, including micropropagation, tissue culture, and layering. These botanical concepts evaluate how desirable characteristics are multiplied and transferred into new plants. Questions on this topic routinely feature in the biology segment of various state and central competitive exams.

Micropropagation methodsArtificial vegetative propagationPlant tissue cultureLayering techniquesMeristem differentiation

Plant Propagation Techniques Questions

Multiple choice

Which of the following statements are correct or wrong?

a. The origin of parts or organs and the gross form of the plant is called morphogenesis. b. The annual plants show unlimited growth. c. Growth regulators are organic substances synthesised in the plant parts. d. The pattern of growth is sigmoid in plants or plant parts.

  1. a and c are correct.

  2. a and d are correct.

  3. b and d are wrong.

  4. c and d are wrong.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The correct answer is option 2.

Multiple choice

Male sterility technique is useful in

  1. pure line selection

  2. production of hybrids

  3. crop improvement

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

Male sterility is extremely useful in hybrid seed production because it prevents self-pollination, ensuring cross-pollination between desired parent lines. This technique allows breeders to produce large quantities of hybrid seeds efficiently and economically. It's not primarily used in pure line selection (which maintains homozygosity) or general crop improvement (which is broader in scope).

Multiple choice

Match the following ||| |---|---| |a. Regeneration|1. It is the process of getting back a full organism from its body part. | |b. Fragmentation|2. It is the process in which new plants are obtained from the parts of old plants without the help of any reproductive organs. | |c. Vegetative propagation|3. It is the process of breaking up of the body of a simple multicellular organism into two or more pieces on maturing, each of which subsequently grows to form a complete new organism. |

  1. a - 1, b - 3, c - 2

  2. a - 1, b - 2, c - 3

  3. a - 3, b - 2, c - 1

  4. a - 3, b - 1, c - 2

  5. a - 2, b - 3, c - 1
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option.

Multiple choice

Sudden elongation of stem, followed by flowering is called

  1. splicing

  2. hardening

  3. bolting

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

Bolting is the rapid elongation of the stem followed by flowering, typically seen in biennial plants like cabbage when exposed to cold (vernalization). It's an adaptation for rapid reproductive growth. Splicing, hardening, and cloning are unrelated processes.

Multiple choice

Which is an applied branch of genetics?

  1. Physiology

  2. Heredity

  3. Plant breeding

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

Plant breeding is an applied branch of genetics that uses genetic principles to improve crop plants for desired traits like yield, disease resistance, and quality. It directly applies Mendelian and molecular genetics in agriculture.

Multiple choice

In grafting, the detached twig or shoot is termed as

  1. scion

  2. rootstock

  3. interstock

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

A piece of detached twig or shoot. The scion usually contains two or three buds, although it may contain more. When the scion is only a single bud, the form of grafting is known as budding.

Multiple choice

The act of joining two plants or more together is known as

  1. simple layering

  2. plant tissue culture

  3. apomixis

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

Grafting is the act of joining two plants together. The upper part of the graft (the scion) becomes the top of the plant, the lower portion (the understock) becomes the root system or part of the trunk. Although grafting usually refers to joining only two plants, it may be a combination of several.

Multiple choice

Onion propagates through

  1. the rhizome

  2. the runners

  3. the adventitious buds

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

Another type of  vegetative reproduction is the production of bulbs. Plants like onion (Allium cepa), hyacinth (Hyacinth), narcissus (Narcissus) and tulips (Tulipa) reproduce by forming bulbs.