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
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Green algae
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Blue algae
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Gladiolus
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All of the above
C
Correct answer
Explanation
Gladiolus is commonly propagated through micropropagation (tissue culture) to produce disease-free, identical plants quickly. Algae reproduce naturally through various methods but are not typically micropropagated in this context.
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They are preserved.
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They are not preserved.
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They are changed.
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They are exchanged.
A
Correct answer
Explanation
Vegetative propagation produces clones genetically identical to the parent plant, preserving its characteristics. Methods include cuttings, runners, tubers, and bulbs. This is different from sexual reproduction which creates variation.
A
Correct answer
Explanation
Bryophyllum reproduces vegetatively through epiphyllous buds that grow along the leaf margins. When these leaves fall on soil, each bud can develop into a new plantlet, making the leaf the primary organ for propagation. Stem, root, and seed are not involved in this specific vegetative process.
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Potato
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Sweet potato
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Guava
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Jasmine
D
Correct answer
Explanation
Jasmine is commonly propagated through layering, where a stem is bent and covered with soil while still attached to the parent plant. Roots develop at the buried section, and the new plant can then be separated. Potato and sweet potato propagate through tubers, while guava is typically grown from seeds or cuttings.
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genetically similar
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genetically dissimilar
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unable to form roots
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unable to form buds
A
Correct answer
Explanation
Vegetative propagation produces clones genetically identical to the parent plant since it involves only mitosis, not meiosis or fertilization. This asexual reproduction preserves exact genetic makeup across generations. Unlike sexual reproduction, there's no genetic recombination or variation.
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Stiffness
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Capability
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Totipotency
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Inheritance
C
Correct answer
Explanation
Totipotency is the ability of a single living plant cell to regenerate into a complete plant through cell division and differentiation. This property is fundamental to plant tissue culture and propagation.
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Mutant
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Clone
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Species
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Variant
B
Correct answer
Explanation
Plants raised through tissue culture are genetically identical and form a clone. This uniform population results from asexual propagation from a single explant, unlike mutants, species (natural groups), or variants (genetic differences).
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redifferentiation
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dedifferentiation
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organ culture
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micropropagation
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grafting
A
Correct answer
Explanation
The ability of the component cells of callus to form a whole plant is known as redifferentiation.
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cell division
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pollination
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vegetative reproduction
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fertilization
C
Correct answer
Explanation
Vegetative reproduction is the development of a new plant from any vegetative part (stem, root, leaf, etc.) without involving seeds or sexual reproduction. Examples include growing plants from cuttings or tubers.
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germination of seed with cotyledons above the soil
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the mature stage of endosperm
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a technique to obtain new plants by growing tissue in culture medium
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an early stage of endosperm
C
Correct answer
Explanation
Micropropagation is a tissue culture technique where plant tissues or cells are grown in a sterile culture medium to produce many genetically identical plants (clones) rapidly.
A
Correct answer
Explanation
Sweet potato is propagated vegetatively through its modified roots called tubers. These tubers contain buds that can grow into new plants, making roots the correct site for vegetative propagation. Other plant parts like stems, leaves, or flowers are not used for sweet potato propagation.
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Pure culture
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Fed-batch culture
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Synchronous culture
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Continuous culture
B
Correct answer
Explanation
To reduce crab-tree effect, a fed-batch process is generally employed for baker's yeast production. Aerobic ethanol formation in the presence of glucose concentration is known as glucose effect or crab-tree effect. In this process, glucose concentration is increased in the media to reduce oxygen consumption by producing appreciable amount of ATP.
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is an ancient practice
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is a more rapid, easier and cheaper method of propagating plants.
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enables rapid reproduction of genetic variation
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gives rise to genetically uniform propagation called the clone.
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None of these
D
Correct answer
Explanation
Vegetative propagation produces clones - genetically identical offspring. This method reproduces plants asexually without seeds, maintaining genetic uniformity across generations.
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Roots
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Stem
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Leaves
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Flowers
D
Correct answer
Explanation
Vegetative propagation uses roots, stems, and leaves to produce new plants asexually. Flowers are reproductive organs involved in sexual reproduction (pollination, fertilization), not vegetative propagation.
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Tissue culture
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Natural selection
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Budding
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Spore formation
A
Correct answer
Explanation
Tissue culture allows horticulturists to produce thousands of genetically identical plantlets from a small piece of plant tissue in a controlled laboratory environment. This method is commercially valuable because it rapidly produces disease-free plants on a large scale, unlike slow natural selection or vegetative methods like budding and cutting that have limited scale.