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

In tissue culture, which of the following are true for a suspension culture?

A. Suspension culture consists of single cells and small groups of cells. B. They must be constantly agitated at 100 to 250 rpm (revolutions per minute). C. Suspension culture is maintained in a medium usually gelled with agar.
D. The cultures grow in 2 to 3 weeks. E. Usually, the medium has the auxin 2,4-D.

  1. A, B and E

  2. A, B and C

  3. A and D

  4. B and C

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

Suspension culture consists of single cells and small groups of cells. 

Multiple choice

Crosses are performed to get new varieties by the process of:

  1. Pollination

  2. Fertilisation

  3. Germination

  4. Hybridization

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

Hybridization is the process of crossing two genetically different individuals to produce new varieties with desired traits. Pollination is the transfer of pollen, fertilization is fusion of gametes, and germination is seed sprouting - none of these are the crossing process itself.

Multiple choice

Vegetative propagation is usually considered as a cloning method. Strawberries are typically propagated asexually by __________.

  1. the runners

  2. offset

  3. stolon

  4. sucker

  5. cladophyll
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Runners are horizontally oriented stems that grow along the soil surface. Their function is vegetative production. For example: number of grasses have stolons. Strawberries are normally propagated asexually by two different methods: runners (stolons) and crown division.

Multiple choice

Why are clones obtained from nucellar culture better than cutting?

  1. Nucellar tissue helps in formation of tap root system.

  2. Nucellar seedlings are vigorous.

  3. Nucellar seedlings are free from diseases.

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

Nucellar tissue helps in formation of tap root system. Nucellar seedlings are free from diseases. Nucellar seedlings are vigorous.