Biology

Plant Propagation Techniques

591 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
  1. Green algae

  2. Blue algae

  3. Gladiolus

  4. All of the above

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

Gladiolus is commonly propagated through micropropagation (tissue culture) to produce disease-free, identical plants quickly. Algae reproduce naturally through various methods but are not typically micropropagated in this context.

Multiple choice
  1. They are preserved.

  2. They are not preserved.

  3. They are changed.

  4. They are exchanged.

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vegetative propagation produces clones genetically identical to the parent plant, preserving its characteristics. Methods include cuttings, runners, tubers, and bulbs. This is different from sexual reproduction which creates variation.

Multiple choice
  1. Leaf

  2. Stem

  3. Root

  4. Seed

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bryophyllum reproduces vegetatively through epiphyllous buds that grow along the leaf margins. When these leaves fall on soil, each bud can develop into a new plantlet, making the leaf the primary organ for propagation. Stem, root, and seed are not involved in this specific vegetative process.

Multiple choice
  1. Potato

  2. Sweet potato

  3. Guava

  4. Jasmine

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Jasmine is commonly propagated through layering, where a stem is bent and covered with soil while still attached to the parent plant. Roots develop at the buried section, and the new plant can then be separated. Potato and sweet potato propagate through tubers, while guava is typically grown from seeds or cuttings.

Multiple choice
  1. genetically similar

  2. genetically dissimilar

  3. unable to form roots

  4. unable to form buds

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vegetative propagation produces clones genetically identical to the parent plant since it involves only mitosis, not meiosis or fertilization. This asexual reproduction preserves exact genetic makeup across generations. Unlike sexual reproduction, there's no genetic recombination or variation.

Multiple choice
  1. cell division

  2. pollination

  3. vegetative reproduction

  4. fertilization

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

Vegetative reproduction is the development of a new plant from any vegetative part (stem, root, leaf, etc.) without involving seeds or sexual reproduction. Examples include growing plants from cuttings or tubers.

Multiple choice
  1. germination of seed with cotyledons above the soil

  2. the mature stage of endosperm

  3. a technique to obtain new plants by growing tissue in culture medium

  4. an early stage of endosperm

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

Micropropagation is a tissue culture technique where plant tissues or cells are grown in a sterile culture medium to produce many genetically identical plants (clones) rapidly.

Multiple choice
  1. root

  2. stem

  3. leaves

  4. flowers

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sweet potato is propagated vegetatively through its modified roots called tubers. These tubers contain buds that can grow into new plants, making roots the correct site for vegetative propagation. Other plant parts like stems, leaves, or flowers are not used for sweet potato propagation.

Multiple choice
  1. Pure culture

  2. Fed-batch culture

  3. Synchronous culture

  4. Continuous culture

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To reduce crab-tree effect, a fed-batch process is generally employed for baker's yeast production. Aerobic ethanol formation in the presence of glucose concentration is known as glucose effect or crab-tree effect. In this process, glucose concentration is increased in the media to reduce oxygen consumption by producing appreciable amount of ATP.

Multiple choice
  1. is an ancient practice

  2. is a more rapid, easier and cheaper method of propagating plants.

  3. enables rapid reproduction of genetic variation

  4. gives rise to genetically uniform propagation called the clone.

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vegetative propagation produces clones - genetically identical offspring. This method reproduces plants asexually without seeds, maintaining genetic uniformity across generations.

Multiple choice
  1. Tissue culture

  2. Natural selection

  3. Budding

  4. Spore formation

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tissue culture allows horticulturists to produce thousands of genetically identical plantlets from a small piece of plant tissue in a controlled laboratory environment. This method is commercially valuable because it rapidly produces disease-free plants on a large scale, unlike slow natural selection or vegetative methods like budding and cutting that have limited scale.