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 evs - i rules are for everyone sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

Phytotron is a device by which 

  1. Electrons are bombarded

  2. Protons are liberated

  3. Plants are grown in controlled environment

  4. Mutations are produced in plants
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A phytotron is an enclosed research greenhouse used for studying interactions between plants and the environment. Phytotrons are chambers, that provide controlled environmental conditions for growing plants. Phytotrons have been extensively used for research on how various environmental factors affect plant growth and development.

Multiple choice botany pollination, fertilization and development of endosperm and embryo agents of pollination environmental conservation and biodiversity pollination and fertilization

By tissue culture, indefinite number of plants from a small amount of parental tissue can be obtained. This technique is of great economic importance as ____________________________.

  1. New species can be generated

  2. Through somaclonal variation, a large number of variants can be isolated

  3. It is a useful method to multiply genetically uniform population of elite species

  4. Homozygous diploids can be obtained
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tissue culture technology is grounded on the fact that the entire plant can be regenerated from explants. This capacity to produce a whole plant from any cell/explant is named totipotency. Individually these plants will be genetically identical to the original plant. Several important food plants like tomato, apple, banana, etc., can be generated on the commercial scale by this method.

Thus, the correct option is C.

Multiple choice botany pollination, fertilization and development of endosperm and embryo agents of pollination environmental conservation and biodiversity pollination and fertilization

Animals assist with

  1. Pollination and seed dispersal

  2. Control of plant growth and response

  3. Translocation of organic nutrients

  4. Asexual propagation of plants
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pollination is when pollen grains from an anther, the male portion of a flower, are transferred to a female part in the flower, known as the stigma. Zoophily is a form of pollination whereby pollen is transferred by animals. Zoophilous species frequently evolve mechanisms to make themselves more appealing to the particular type of pollinator. Seed dispersal is the movement or transport of seeds away from the parent plant. Plant species transported externally by animals can have a variety of adaptations for dispersal, including adhesive mucus, and a variety of hooks, spines and barbs

So, the correct answer is 'pollination and seed dispersal'

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

Artificial vegetative propagation is a .......... method.

  1. Slow

  2. Natural

  3. Man-made

  4. Both A and C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Artificial propagation is the creation of new life by other than the natural means available to an organism. Cutting plants' stems and placing them in compost is also a form of artificial reproduction. We can grow many plants from one plant by using the man-made methods. The process of growing many plants from one plant by man-made methods is called as the artificial propagation of plants.

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

The term scion is used in 

  1. Embryology

  2. Grafting

  3. Agamospermy

  4. Emasculation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Embryology is the science of development of the embryo. It is a branch of science which deals with the development of gametes, fertilization, and development of embryos.
Scion is the detached living part of the plant which is grafted to the stalk by the process of grafting. 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 techniques are mostly used in the asexual mode of reproduction. 
Agamospermy is an asexual reproduction in which seeds are produced from unfertilized ovules.
The removal of the anthers of a flower in order to prevent self-pollination is known as emasculation.
So, the correct answer is option B.
Multiple choice botany reproduction in angiospermic plants artificial vegetative propagation asexual modes of reproduction common modes of vegetative propagation

Mango and guava are propagated through

  1. Tissue culture.

  2. Grafting.

  3. Stem cuttings.

  4. Layering.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mango and guava are propagated through grafting. 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. The techniques are mostly used in the asexual mode of reproduction. 

So, the correct answer is option B.

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

Clones do not appear during.

  1. Cuttings

  2. Budding

  3. Grafting

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

Clones are the result of asexual reproduction. Seed propagation involves sexual reproduction (fertilization), which introduces genetic recombination and variation, meaning the offspring are not clones.

Multiple choice biology chemical coordination in plants cytokinins plant hormones plants and animal hormones

Which of the following is not properly matched?

  1. Explant - excised plant part used for callus formation

  2. Cytokinins - root initiation in callus

  3. Somatic embryo - embryo produced from a vegetative cell

  4. Anther culture - haploid plants

  5. Callus - undifferentiated mass of cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plant cells are totipotent means, each cell retains total potential to generate a new plant. Callus is an undifferentiated mass of cell generated in plant tissue culture from meristematic cells from which entire plant can be regenerated. The small piece of meristematic tissue which is used in tissue culture to generate callus is called an explant. The ratio between auxin and cytokinin is an important factor deciding initiation of roots and shoots. Phytohormone cytokinin promotes growth of shoot whereas auxin promotes growth of roots. Anther culture is done for production of haploids because anthers contain haploid microspores which can be used to generate new plants. Somatic embryos are produced by direct fusion of somatic cells one with nucleus and another without nucleus.

Multiple choice biology chemical coordination in plants cytokinins plant hormones plants and animal hormones

In tissue culture, differentiation of shoot is controlled by ...........................

  1. Light Intensity

  2. Temperature shock
  3. Low Auxin and high CK $\left (High\, \frac{Cyto}{Auxin}\, Ratio \right )$

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cytokinins promote cell division and differentiation of young, relatively unspecialized cells into mature, more specialized cells in intact plants. They are a required ingredient in any plant tissue culture medium and must be present for cells to divide. In tissue culture, cytokinins interact with auxin during the formation of plant organs such as roots and stems. For example, in tobacco tissue culture a high ratio of auxin to cytokinin induces root formation, whereas a low ratio of auxin to cytokinin induces shoot formation.

Multiple choice biology cell biology and biotechnology stds and infertility gm crops biotechnology

Which of the following processes involves transferring and combination of desirable characteristic features into plants and multiply them ?

  1. Parthenocarpy

  2. Genetic engineering

  3. Eutrophication

  4. Broadcasting
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Genetic engineering is the branch of science which deals with the modification of genes. The desired genes is isolated from the host and are inserted into the vectors. The vectors carries the foreign gene into the desired organism and multiples. The foreign gene multiplies along with the vector and produce a new character.

So, the correct answer is option B.

Multiple choice biology organisation of the organism membrane bound organelles cell: size and differentiation microscopy

Cell cultures of Lithospermum erythrorhizon are being used commercially for preparing.

  1. Berberine

  2. Plamitine

  3. Shikonin

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

Cell cultures of Lithospermum erythrorhizon are widely used in biotechnology for the commercial production of shikonin, a red naphthoquinone pigment with medicinal and dye properties.

Multiple choice

Plant part used for culturing is

  1. Scion

  2. Explnt

  3. Stock

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

An explant is any plant part, tissue, or organ excised from a donor plant and used to initiate an in vitro plant tissue culture. Other terms like stock and scion refer to parts used in traditional grafting, not tissue culture.

Multiple choice

Which media used in tissue culture tech

  1. B5

  2. M.s

  3. White

  4. Gambrus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Murashige and Skoog (MS) medium is the most widely used nutrient medium for plant in vitro cell, tissue, and organ culture.

Multiple choice

Example of micropropagation

  1. Bud

  2. Leaf

  3. Root

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

Micropropagation can be initiated from various types of plant tissue explants, including buds, leaves, stems, and roots, to regenerate whole clonal plants.