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 apical dominance auxins and gibberellins growth and development plant growth and development biology

To get a carpet like grass, lawns are mowed regularly, this is done to

  1. Remove the shoot apical meristem

  2. Remove the axillary buds

  3. Accelerate the growth of terminal bud

  4. Both (b) and (c)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The lawn is mowed regularly to remove apical meristem, and prevent vertical growth of the grass and enhance the growth of lateral buds whose growth is hindered due to apical dominance. This helps the grass get a spreading or carpet like appearance.

So, the correct answer is 'Remove the shoot apical meristem'

Multiple choice evs modern agriculture agricultural practices in india different types of farming and agriculture various agricultural practices

In which method plants grow under the complete controlled condition?

  1. Organic farming

  2. Precision farming

  3. Polyhouse farming

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

A polyhouse also called polytunnel is a tunnel made of polyethelene semi-circular, square or elongated in shape. Solar radiations are used to heat up the interior. This warms the plants, soil, and other things inside the building faster than heat can escape the structure. This warmed air in interior surfaces is retained in the building by the roof and wall.Temperature, humidity and ventilation is controlled by equipment fixed in the polytunnel or by manual opening and closing of flaps. Thus plants grow under the complete controlled condition in polyhouse farming. 

Multiple choice evs modern agriculture agricultural practices in india different types of farming and agriculture various agricultural practices

Which of the following technique is used for rooftop gardening?

  1. Hydroponics

  2. Aeroponics

  3. Green roof

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

(A)Hydroponics is also called as a floating-raft system in which farming is done without using soil on a nutrient-rich solution. For Example, Mint, Tomato, Potato, Lettuce, Basil etc.

(B)Aeroponics is an indoor gardening method in which plants are grown in a mist environment. Tomato, Pepper, Cucumber, e.t.c are some of the examples
of Aeroponics.
(C)Green Roof Is a system of planting trees covered with vegetation and growing medium. Small grasses, Herbs, Flowering Plants, e.t.c are some of the examples of the Green roof.
So, the correct option is 'All of the above'.

Multiple choice zoology genetics of the future hgp and dna fingerprinting dna fingerprinting human genome project and dna fingerprinting

VNTR is employed for

  1. Protoplasm culture

  2. DNA finger printing

  3. Regulation of plant growth hormones

  4. Enhancing photosynthesis in desert plant
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A variable number tandem repeat (VNTR) refers to the presence of a short nucleotide sequence as a tandem repeat on many chromosomes; it exhibits variations in length and number of repeats between individuals. VNTR are 10-100 bp long. This DNA polymorphism is revealed during DNA finger printing in creating DNA profile of individuals. For the purpose, restriction enzyme digested DNA samples are sorted by gel electrophoresis followed by southern blotting. Finally, radioactive probes are washed over the nylon surface to allow their joining to any DNA fragments of the same composition; option B is correct.  

Protoplasm culture is the fusion of protoplasm of two different species /individuals to bring their traits together in the hybrid. 
Plant growth hormones are the natural as well as artificially synthesized chemicals that control plant growth and development. Genes for abiotic stress tolerance factors such as glycine betaine are cloned in desert plants to increase their photosynthetic capacity by enhancing their tolerance for abiotic stress. The correct answer is B.

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Why is vegetative propagation possible by leaves?

  1. It possesses dividing cells

  2. It possesses dead cells

  3. It possesses chlorophyll

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

Vegetative propagation is possible by leaves as the process is continued by differentiating leaf parenchyma, which is probably often phloem parenchyma or companion cells, the two of which are often indistinguishable,  into new root and shoot apical meristems.

So the correct option is 'It possesses dividing cells'.

Multiple choice civics agriculture in india - i : introduction agricultural reforms indian agriculture problem and policies plantation of crops

Cultivation of orchids, gladiolus, lily, carnation, anthurium etc is called _______.

  1. Horticulture

  2. Commercial farming

  3. Floriculture

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

Floriculture or flower farming is the study of growing and marketing flowers and foliage plants. Floriculture includes cultivation of flowering and ornamental plants for direct sale or for use as raw materials in cosmetic and perfume industry and in the pharmaceutical sector. It also includes production of planting materials through seeds, cuttings, budding and grafting. In simpler terms floriculture can be defined as the art and knowledge of growing flowers to perfection. The persons associated with this field are called floriculturists.

Multiple choice civics agriculture in india - i : introduction agricultural reforms indian agriculture problem and policies plantation of crops

Which of the following statements are true

A. Ornamental plants are plants that are grown for decorative purposes

B. Growth of ornamental plant is included under floriculture

  1. Only A

  2. Only B

  3. Both A and B

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

Among the given statements both are true. Ornamental plants are plants that are grown for decorative purposes and their growth and culture is included under floriculture. It deals with growing, marketing flowers and ornamental plants as well as flower arrangement.

Multiple choice botany ecological adaptations, succession and ecological services ecosystem services ecosystems ecosystem

Which of the following is the natural method of hybridisation?

  1. Interspecific hybridisation

  2. Cross pollination

  3. Somatic cell hybridisation

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

Cross pollination is the transfer of pollen from the anthers of a flower of one plant to the stigma of a flower of another  plant. It is a natural process.

So, the correct answer is 'cross pollination'

Multiple choice botany root - external morphology root systems root system in plants forms of root

Turnip is an example for

  1. Unmodified taproot

  2. Modified taproot

  3. Modified napiform root

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

In a plant with a taproot system, the taproot is the largest, most central and most dominant root. Typically a taproot is straight and very thick. It is tapering and grows directly downward. From taproot, other roots sprout laterally. Napiform type of storage root is distinct from taproot. The root has a top-like in appearance. It is very broad at the top and tapers suddenly like a tail at the bottom. Turnip is an example for modified taproot and modified napiform root. 
Thus, the correct answer is option D.

Multiple choice botany know the plant world closely diversity in plants types of nutrition in plants different modes of nutrition in plants

An epiphyte is a plant that grows on other plants, using them for support but not for nutrition

  1. True

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

Epiphytes are the plants which grow on the other plants for the support as they are weak themselves. They don't harm the plant on which they grow. They obtain their nutrients and moisture from the air. For example : mosses.

So, the correct option is 'True'.

Multiple choice plant diseases keeping diseases away biology

Plants can be made disease resistant through

  1. Colchicine treatment

  2. X-ray treatment

  3. Breeding with wild relatives

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

Breeding with wild relatives is a traditional and effective method to introduce disease-resistance genes into cultivated crop varieties.

Multiple choice botany inflorescence introduction to inflorescence inflorescence and its type basics of leaf and flower

Cauliflory is?

  1. Production of new plants from cauline buds

  2. Formation of flowers from old stem

  3. Development of flowers on young branches

  4. Clustering of flowers
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Cauliflory is a botanical term referring to plants that flower and fruit from their main stems or woody trunks rather than from new growth and shoots. This can allow trees to be pollinated or have their seeds dispersed by animals which cannot climb or fly.

So, the correct answer is 'formation of flowers from old stem'.