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 biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

The Hydroponics is most closely related to which among the following?

  1. Grafting of Plants

  2. Water conservation

  3. Study of Vegetable

  4. Soilless culture of Plants
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydroponics is a method of growing plants without soil, using mineral nutrient solutions in a water solvent. It is the definition of soilless culture.

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Which one of the following statements correctly fines the term hydroponics?

  1. Growing plants in soil less culture

  2. Culture of fishes by varying the water supply

  3. Growing planktons on the surface of water

  4. Growing plants in sterilized soil
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hydroponics is defined as the technique of growing plants in nutrient-rich water solutions without the use of soil as a growth medium.

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

The technique of growing plants in a nutrient solution, in complete absence of soil is called as ___________.

  1. Aeroponics

  2. Water culture

  3. Hydroponics

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

Cultivation of plants by placing the roots in the nutrient solution (in complete absence of soil) is called hydroponics. It is necessary to aerate the solution to provide roots with adequate oxygen supply. The result obtained from soil-less culture may then be used to determine deficiencies under field conditions.

Multiple choice biology biology : an introduction introduction to organization of life signs of life what is living?

The buds on the potato determine the which of the following ability of the living organism?

  1. Locomotion

  2. Growth

  3. Movement

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

Buds of potato are a type of vegetative reproductive part of the potato. These buds can individually be grown as a whole new plant with proper habitat and nutrition. 

So the correct option is B "growth".

Multiple choice chemistry separation of matter crystals and crystallisation filtration and crystallisation other methods of separation

Crystals can be grown by _________.

  1. cooling a saturated solution

  2. heating a saturated solution

  3. stirring a saturated solution

  4. planting in a well watered fertile soil
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cooling a saturated solution. (Heating is stopped at the point when a hot saturated solution is formed. If the resulting solution is allowed to cool to room temperature, the dissolved solid will precipitate out as pure crystals.)

Multiple choice biology mineral nutrition in plants hydroponics nutrients and nutrition hydroculture

Choose the correct answer from the alternatives given.
Hydroponics is a technique of growing:

  1. submerged Plants

  2. free-floating aquatic plants

  3. terrestrial plants in sand

  4. plants in aqueous balanced nutrient medium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydroponics is a subset of hydroculture, which is a method of growing plants without soil by using mineral nutrient solutions in a water solvent. Terrestrial plants may be grown with only their roots exposed to the mineral solution, or the roots may be supported by an inert medium, such as perlite or gravel. So, the correct answer is "plants in the aqueous balanced nutrient medium".

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

The desired varieties of economically useful crops can be produced by_________

  1. Vernalisation

  2. Mutation

  3. Natural selection

  4. Hybridisation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • The mating or crossing of two plants or lines of dissimilar genotype is known as hybridization. 
  • The chief objective of hybridization is to create genetic variation when two genotypically different plants are brought together in F1. Segregation and recombination produce many new gene combinations in F2 and the later generations, i.e., the segregating generations. 
  • The degree of variation produced in the segregating generations would, therefore, depend on the number of heterozygous genes in the F1 which in turn depends upon the number of genes for which the two parents differ. 
  • The aim of hybridization may be the transfer of one or few qualitative characters, the improvement in one or more quantitative characters, or use the F1 as a hybrid variety. 
  • Breeding new crops are important for ensuring food security by developing new varieties that are higher-yielding, resistant to pests and diseases, drought-resistant or regionally adapted to different environments and growing conditions.

Therefore, the correct answer is option D.
Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

Method of preserving favourable variants and elimination of undesirable plants is termed as________

  1. Selection

  2. Hybrid

  3. Hybridization

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

  • The selection is the oldest method of plant breeding in which the two plants are selected on the basis of the superior characters. This method helps in the elimination of undesirable characters. The two plants are selected in order to preserve the favorable traits. This method involves the preservation of the plants which have superior characters. 
Thus, the correct answer is option A. 

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

.......... is a sterile hybrid which spreads by rhizome division

  1. Iris albicans

  2. Evening primrose

  3. Tangelo

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

Hybrid plants can be developed by the breeding of the plants of different species. The parents are genetically different plants. Iris albicans is the sterile hybrid which is developed by breeding of two different species. This is known as interspecific hybridization. This is a sterile plant which spreads by rhizome division.

Thus, the correct answer is option A. 

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

In crop improvement programmes, haploids are of  great importance because they ___________________.

  1. Grow better even under adverse climatic conditions

  2. Are useful in studies of meiosis.

  3. Have less requirement for energy inputs

  4. Give homozygous lines following diploidization
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Haploids are useful in plant breeding because they can be doubled (diploidized) to produce completely homozygous lines in a single generation.

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

The technique of combining of desirable characteristics in one plant and then multiplying such individual to the extent that it is easily available for common use of farmers is know as crop improvement.

  1. True

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

The  method of altering the genetic pattern of plants to increase their value and utility for human welfare, is called crop improvement or plant breeding. 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. iit is purely depends on domestication.

So the given statement is true.

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

The main aim of plant breeding is_____________

  1. To produce improved varieties

  2. To make soil fertile

  3. To control pollution

  4. To become more progressive
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Plant breeding aims to improve the characteristics of the plant so that they become more desirable agronomically and economically. 
  • Thus, the chief objective of plant breeding is to develop such improved varieties of crop plants that will be commercially successful. 

Therefore, the correct answer is option A.

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

The science of improving crop varieties is called as____________________

  1. Crop improvement

  2. Selection

  3. Introduction

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

  • Plant breeding is the art and science of changing the traits of plants in order to produce desired characteristics. 
  • Plant breeding can be accomplished through many different techniques ranging from simply selecting plants with desirable characteristics for propagation, to more complex molecular techniques. 
  • Plant breeding aims to improve the characteristics of the plant so that they become more desirable agronomically and economically. 
  • Thus, the chief objective of plant breeding is to develop such improved varieties of crop plants that will be commercially successful. 
  • Generally, a successful variety is one with a total balance of traits that makes it more profitable for growers. 
  • Quality characters vary from one crop to another, e.g., grain size, colour, milling and baking qualities in wheat (Triticum aestivum), cooking quality in rice (Oryza sativa), malting quality in barley (Hordeum vulgare), size, colour, and flavour of fruits, keeping quality of vegetables, protein content in cereals and legumes, lysine content in cereals, methionine and tryptophan contents in pulses, etc.

Therefore, the correct answer is option D.

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

The aim of plant breeding is to produce_____________

  1. Disease-free varieties

  2. High-yielding varieties

  3. Early-maturing varieties

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

  • Plant breeding aims to improve the characteristics of the plant so that they become more desirable agronomically and economically. 
  • Thus, the chief objective of plant breeding is to develop such improved varieties of crop plants that will be commercially successful. 

Therefore, the correct answer is option D.