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 botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

From which technique, new and better varieties of crop plants are formed

  1. Selection

  2. Hybridisation

  3. Grafting

  4. Hybridisation followed by selection.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plant breeding typically involves hybridizing parents with desirable traits, followed by the selection of the best offspring from the resulting population to stabilize those traits.

Multiple choice botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

During somatic hybridisation in plants

  1. Somaclones are produced in large numbers

  2. Apical meristems are cultured to get virus-free plant

  3. Cell walls and middle lamella are digested before fusing the cells

  4. Crop plants with higher levels of vitamins, proteins, and minerals are hybridised.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Somatic hybridization involves the fusion of protoplasts. To achieve this, the cell walls must be removed using enzymes like cellulase and pectinase to allow the plasma membranes to fuse.

Multiple choice botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

Process of bringing wild species of plants under cultivation to suit human needs is called

  1. selection

  2. hybridization

  3. domestication

  4. cultivation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Domestication is the process where wild plant and animal species are adapted into the cultivation area for human use.
The species that are domesticated are used for food, work, medicine and various other uses.
Once the wild species are being domesticated they need to be raised and cared for by humans.
So, the correct option is 'domestication'
Multiple choice botany plant breeding method of plant breeding for crop improvement plant breeding for food production biotechnology

The main objective of plant breeding is to develop new crop varieties superior in all aspects as compared to the existing types.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Plant breeding is a method of altering the genetic pattern of plants to increase their value and utility for human welfare. It is a purposeful manipulation of plants to create desired plant types that are better suited for cultivation, give better yield and are disease resistant. The main aim of plant breeding is to obtain higher yield, improved quality, resistance to pathogens and pests, etc.

So the given statement is true.
Multiple choice biology breeding and biotechnology method of plant breeding for crop improvement plant breeding for food production biotechnology

Steps to be followed by a plant breeder to get disease-resistant crops are.

  1. Screening of germplasm for disease resistant varieties.

  2. Hybridisation of selected parents.

  3. Selection and evaluation of the hybrids.

  4. Testing and release of new varieties.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The first step in breeding for disease resistance is identifying and screening the available germplasm to find sources of resistance that can be incorporated into commercial varieties.

Multiple choice biology breeding and biotechnology method of plant breeding for crop improvement plant breeding for food production biotechnology

Virus free plant can be obtained through

  1. Grafting

  2. Callus culture

  3. Shoot tip culture

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

The shoot tip culture used for obtaining disease free plant without genetical changes. The plant which affected by any contaminant mostly by viruses have saved by shoot tip culture, because shoot tip of any affected plant is less or free from contamination (viruses, bacteria, fungus or others). Plant shoot tip are more efficient to cultivation or differentiation in-vitro because cells of them newly generated and healthy comparison to other parts. 

Thus, the correct answer is option C.

Multiple choice botany pollination, fertilization and development of endosperm and embryo types of pollination cross pollination pollination and its types

Cross pollination is important for producing

  1. New varieties of plants

  2. Plants with better growth

  3. More viable seeds

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

  • Cross-pollination is important for the production of new varieties of plants. Plants are having better growth and the creation of more viable seeds.  
  • Cross-pollination is the process where the plants of different variety can breed with another to create a unique plant. 
  • The resultant plant shows the characteristics of both the parent generation and therefore it is used to create new varieties of plants. 
  • Cross-pollination is also performed to create more viable seeds of plants and also to generate plants having a better scope of growth.
  • The correct option is D. 

Multiple choice geography australia - location, political divisions and physical features australia australia australia - geographical features

How much time is required for a sugarcane plant to be matured?

  1. 5 months

  2. 7 months

  3. 9 months

  4. 14 months
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sugar cane grows for 12 to 16 months before being harvested between June and December each year. When harvested, the cane stands two to four metres high. Queensland's sugar cane is harvested by self-propelled harvesting machines.

Multiple choice botany the life cycle of plants parthenocarpic fruits parthenogenesis asexual reproduction

It is possible to produce seedless tomato fruits by

  1. Spraying hormones on flowers

  2. Spraying mineral solution on plants

  3. Applying trace elements in tomato fields

  4. Applying fertilizers containing radioactive elements
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Seedless tomato fruit can be grown without fertilization if the plant growth hormone is sprayed on them. This will result in their parthenocarpy. This is the technique of induced parthenocarpy where the vegetables are sprayed with plant growth regulators. 

Show the correct option is 'Spraying hormones on flowers'

Multiple choice biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

Many herbs of medicinal value can be obtained on a commercial scale by __________________.

  1. Developing a quick rooting and multiplying medium for vegetative buds

  2. Long-term hybridization process for increasing fertility of seeds

  3. Physiological research for finding the cause of non-viability of seeds

  4. Using the hormone dipping system for cutting
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Commercial scale production of medicinal herbs often relies on vegetative propagation techniques, such as developing efficient rooting and multiplication media for buds, to ensure genetic uniformity and rapid growth.

Multiple choice botany flower taxonomic description of flower technical terms related to flowers basics of leaf and flower

Biennials are

  1. Plants, which remain vegetative in first growing season but produce flowers in the next season.

  2. Plants producing flowers twice in their lifecycle.

  3. Plants, which flower many times.

  4. Plants finishing their lifecycle in one season only.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Biennials are plants, that complete their life cycle in two growing seasons. They produce rosettes of leaves and sometimes the stems the first year, but do not flower until the second, after which they die.

Multiple choice botany option b: biotechnology and bioinformatics gram staining microbiology: organisms in industry cell wall and cell membrane

Moving on a grass lawn facilitates better maintenance primarily owing to 

  1. Removal of apical dominance and promotion of lateral meristem

  2. Removal of apical dominance

  3. Wounding which stimulate rapid regeneration

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

Sometimes apical bud inhibits the growth of lateral buds, it is called apical dominance. By moving on a grass lawn apical buds are removed and apical dominance of grass is breaked.

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

........... is the most convenient and cheap method of artificial vegetative propagation.

  1. Grafting

  2. Budding

  3. Cutting

  4. Micropropagation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Cutting is the most convenient and cheap method of artificial vegetative propagation because it doesn't require any skilled trained technique and it is not affected by contamination. On the other hand, the technique like grafting and budding requires skilled hand while micropropagation is highly sensitive to contamination and requires skilled hand.
Grafting is a horticulture technique where the living detached portion of the plant are used to regenerate the growth. 
Budding is a type of asexual reproduction which do not involve fusion of gametes. A new organism develops from an outgrowth or bud due to cell division at one particular site. The bud remains attached to the parent plant and separates after it gets mature. It leaves a scar at the point of separation. 
Cutting is a technique where the vegetative part is used for the propagation of plant. Cuttings are meristematic in nature so it can easily grow into a new plant.
Micropropagation is the process of multiplication and maintenance of genetically modified or hybrid plant. 
So, the correct answer is option C.