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 botany identifying the plants transport of water across plants habit of plants plant classifications

The part of plant used for culturing is called ___________.

  1. Scion

  2. Explant

  3. Stock

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

Explanation: In biology, explant culture is a technique used for the isolation of cells from a piece or pieces of tissue. Tissue harvested in this manner is called an explant. It can be a portion of the shoot, leaves, or some cells from a plant, or can be any part of the tissue from an animal, or from umblical cord tissue.

Multiple choice biology water absorption and ascent of sap in plants transport of water across plants habit of plants plant classifications

Phytotron in meant for

  1. Controlled irradiation

  2. Induction of mutations

  3. Controlled humidity

  4. Growing plants under controlled environment
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A phytotron is a specialized facility designed for growing plants under strictly controlled environmental conditions, such as temperature, humidity, and light.

Multiple choice zoology applications of biotechnology cloning process of cloning gene cloning

Plants having similar genotypes produced by plant breeding are called as 

  1. Clone

  2. Haploid

  3. Autopolypoid

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

Cloning is the process of producing similar populations of genetically identical individuals that occurs in nature when organisms such as bacteria, insects or plants reproduce asexually. The term clone is used in horticulture to refer to descendants of a single plant which were produced by vegetative reproduction. Many horticultural plant cultivars are clones, derived from a single individual, multiplied by some process other than sexual reproduction.

Therefore, the correct answer is option A.

Multiple choice biology mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements

Which of the following technique/s of agriculture is gaining significance in developing space foods?

  1. Aeroponics

  2. Hydroponics

  3. Somatic hybridization

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

 A.Aeroponics is growing a plant in air or mist environment.This technique is gaining significance in developing space foods because it do not require soil to grow the plant.

 B.hydroponic is growing plant in nutrient-enriched water without soil. This technique is gaining significance in developing space foods because it do not require soil to grow the plant.
C.Somatic hybridization - Fusion of protoplasts of two different plants.
So the correct option is "both A and B".

Multiple choice biology mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements

The basic principle of aeroponics includes

  1. Growing plants in a suspended or closed environment.

  2. Growing plants by callus culture.

  3. Growing plants in the presence of growth hormones.

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

Aeroponics is a method of growing plants with their roots suspended in the air in a grow chamber. The chamber contains the water-based solutions that is used to promote healthy growth in the plants. Water is pumped from the reservoir into the mirco-jet nozzles which distribute the nutrient solution to the roots at definite intervals. This is an enclosed system i.e. whatever does not get absorbed by the roots falls back down into the solution chamber and gets cycled through again. The microbes on the plant are in an oxygen-rich environment. This allows the microbes time to digest the nutrients and to make them immediately available for the plant’s use. Well-circulating CO2 in the room also enhances growth. Thus the correct answer is option A.

Multiple choice biology mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements

The method of growing plants by using air in absence of soil or any artificial medium?

  1. Aeroponics

  2. Hydroponics

  3. Suspension culture

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Aeroponics is a method of growing plants with their roots suspended in the air in a chamber. Nutrient-rich water is sprayed on the roots of the plants. The microbes on the plant are in an oxygen-rich environment. This allows the microbes time to digest the nutrients and to make them immediately available for the plant’s use. Well-circulating CO$ _2$ in the room also enhances growth. 
Thus the correct answer is option A.
Multiple choice biology mineral nutrition in plants hydroponics hydroculture essential and non-essential mineral elements

Aeroponics is growing plants in

  1. Air

  2. Satellites

  3. Other planets and space

  4. Stands with liquid spray of their roots
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Aeroponics is the technique of growing plants in air. The roots of the plants hang in air supplied with nutrients and water on a regular basis. 

Here the soil is not required for growing the plant because the fulfillment of the nutrients of the plant is getting done through the regular mist of the nutrients spray.

Multiple choice botany option b: biotechnology and bioinformatics dna transfer rdna technology - dna transfer and transformation biotechnology in agriculture

Select the wrong statement from the following.

  1. Pectinase and cellulase dissolve the cell wall.

  2. Some Cyanobacteria form symbiotic association with the fern Azolla.

  3. Regeneration of cell wall in somatic hybridisation is induced by PEG.

  4. Plants obtained through pollen culture are always haploids.

  5. Shoot regeneration in callus is promoted by cytokinin like BAP.

  6. None of the above.
Reveal answer Fill a bubble to check yourself
F Correct answer
Explanation

Pollen culture (microspore culture) is a technique in which haploid plants are obtained from isolated pollen grains. Pollen or microspore culture is an in vitro technique by which the pollen grains, preferably at the uninucleate stage, are squeezed out aseptically from the intact anther and then cultured on nutrient medium where the microscope, without producing male gametes, develop into haploid embryoids or callus tissues that give rise to haploid plantlets by embryogenesis or organogenesis. Polyethylene glycol (PEG)-mediated cell fusion is a simple and efficient technique used widely for the production of somatic cell hybrids and for nuclear transfer in mammalian cloning. Fusion can be performed between adherent and suspension cells or between adherent cells or suspension cells. Cytokinins are the key factor to induce the direct shoot regeneration. Azolla form a symbiotic relationship with the cyanobacterium, Anabaena azollae, which fixes atmospheric nitrogen, giving the plant access to the essential nutrient. Pectinase is an enzyme that breaks down pectin, a polysaccharide found in plant cell walls. Cellulases contribute to the enzymatic splitting of cellulose, a component of cell wall.

Multiple choice zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

The inherent capacity of a cell to regenerate a new whole organism or plant is called as

  1. Ontogeny

  2. Totipotency

  3. Differentiation

  4. Homeostasis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The inherent potentiality of a plant cell to give rise to a whole plant is described as cellular totipotency. This is a capacity which is retained even after a cell has undergone final differentiation in the plant body. In plants, even highly mature and differentiated cells retain the ability to regenerate to a meristematic state as long as they have an intact membrane
system and a viable nucleus. This is contradicting to animals, where differentiation is generally irreversible. Totipotent cells can form all the cell types in a body, plus the extra embryonic, or placental, cells. Embryonic cells within the first couple of cell divisions after fertilization are the only cells that are totipotent in animals.
Therefore, the correct answer is option B.
Multiple choice botany economically useful plants and entrepreneurial botany horticulture organic farming horticulture and organic farming

Science of cultivation, breeding, marketing and arrangement of flowers is called.

  1. Arboriculture

  2. Floriculture

  3. Horticulture

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

Floriculture, or flower farming, is a discipline of horticulture concerned with the cultivation of flowering and ornamental plants for gardens and for floristry, comprising the floral industry. 

So, the correct option is 'Floriculture'.

Multiple choice natural vegetative propagation reproduction in plants biology

Leaf tips help in vegetative propagation in

  1. Begonia

  2. Bryophyllum

  3. Sensevieria

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

The tip of the leaf help in vegetative propagation in Adiantum caudatum. It is an evergreen, perennial fern producing fronds up to 60 cm tall from a shortly-creeping rhizome. It is also known as Maidenhair fern because of the shiny black rachis of the leaves. It has buds at the tip of the leaf which helps in vegetative propagation. The buds enter the ground when the leaf bends and touches the soil. There they develop into a new individual. Due to this phenomena, it is also known as walking fern.

So, the correct answer is option D.

Multiple choice natural vegetative propagation reproduction in plants biology

Roots are used in the vegetative propagation of

  1. Ginger.

  2. Chrysanthemum.

  3. Sweet Potato.

  4. Potato.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The asexual reproduction where the vegetative part of the plant which give rise to a new plant is known as vegetative reproduction. Ginger is propagated by the rhizome. Chrysanthemum is propagated by stem cutting. Roots are used in vegetative propagation of sweet potato. The roots bear adventitious buds from which new plants can develop when it is buried in the moist soil. Such roots are called reproductive roots. Potato is propagated by eye of tuber.
So, the correct answer is option C.
Multiple choice natural vegetative propagation reproduction in plants biology

Vegetative propagation by leaves is found in

  1. Albizzia lebbek

  2. Dalbergia sisso

  3. Bryophyllum diagremontianum

  4. Murraya sp
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Bryophyllum diagremontianum is characterized, by the formation of plantlets in leaf notches while attached to the plant. The multiplication of the plant takes place by vegetative propagation. Bryophyllum is multiplied vegetatively by leaves. The leaves of the Bryophyllum has an adventitious bud in its notch which is meristematic in nature and sprouts when attached to the plant. It adventitious bud has the potential to germinate into new plantlet when it falls on the moist soil by rooting.
So, the correct answer is option C.