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 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 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'.
Multiple choice development of plants plant growth growth and development plant growth and development biology

Growth of a shoot or a root involves

  1. Cell enlargement

  2. Cell division

  3. Cell differentiation

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

Growth is an irreversible increase in the size. There are three developmental stages of growth of all plant parts including shoot and root. These are cell division, cell enlargement and cell differentiation. Cell division is the first phase that results in increase in the number of cells. In plants, karyokinesis, division of nucleus is followed by cytokinesis, the division of the cytoplasm. Cell enlargement gives the proper size to the organ and tissue. During this, protoplasm, vacuole, etc are formed. Cell differentiation is seen at cell level, tissue level, organ level and at the level of an organism. The cells differentiate to form different types of tissues that later perform different but specific functions.

Thus, the correct answer is option D.

Multiple choice development of plants plant growth growth and development plant growth and development biology

If a part of pith from the stem of a plant is used as an explant and cultured on nutrient medium, which of the following processes is responsible for the formation of an undifferentiated mass of cells called callus?

  1. Growth

  2. Differentiation

  3. Dedifferentiation

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

The portion of pith taken as an explant comprises of parenchymatous cells (i.e., simple permanent tissue which have lost the capacity to divide). When such cells are cultured on solid culture media, the parenchymatous cells of pith become meristematic and start dividing resulting in a mass of undifferentiated cells called callus. This is an example of dedifferentiation. 

Multiple choice development of plants plant growth growth and development plant growth and development biology

The cells derived from meristems differentiate and regain the capacity to divide by a phenomenon called

  1. Differentiation

  2. Dedifferentiation

  3. Redifferentiation

  4. Totipotency

  5. Regeneration
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In plants, apical meristems divide and differentiate to perform a specific function. This phenomenon is called as differentiation. Sometimes, the differentiated cells in plants regain the capacity to divide under certain conditions. This phenomenon is called as dedifferentiation. An interfascicular vascular cambium is an example of dedifferentiation. During dedifferentiation, certain cells lose the capacity to divide and becomes mature. This phenomenon is called as redifferentiation.

Thus, the correct answer is option B.

Multiple choice development of plants plant growth growth and development plant growth and development biology

The ability of the callus cells to differentiate into a plant organ is

  1. Differentiation

  2. Dedifferentiation

  3. Redifferentiation

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

The phenomenon of generation of whole plant by single cell is totipotency.

This is the characteristic of plants mostly. When a plant of differentiated tissue is cultured in a nutrient medium  it gain the property of division get specialized and form and organ.
So the correct option is "Redifferentiation".

Multiple choice botany plant tissue system ground tissue system ground tissues tissue systems

For a successful graft, the adhesion between stock and scion is a must. 

Which one of the following is the earliest event towards a good graft?

  1. Production of plasmodesmata in the cells at the interface of stock and scion.

  2. Coordinated differentiation of vascular tissue between the stock and scion.

  3. Regeneration of cortex and epidermis over the union of stock and scion.

  4. Production of callus tissue between the cells of stock and scion.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Grafting is a technique whereby tissues from one plant are placed or inserted into another in such a way that the vascular tissues of both the plants may join together. The plant which is selected for its roots is called as the stock and the one selected for its stems and leaves and flowers is called as the scion. For successful grafts, the events that should take place is the production of the callus tissue between the cells of the stock and scion. 

Thus, the correct answer is option D.

Multiple choice zoology plant reproduction different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

A genetic clone is

  1. Plants produced by asexual means

  2. Hybrid produced by sexual means

  3. Homozygous plant produced by sexual means

  4. Heterozygous plant produced by sexual means
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A group of organisms, genetically related with one another and are formed from a single parent by means of asexual reproduction. In the genetic clone, all progeny are morphologically and genetically related with one another.

So, the correct answer is 'plants produced by asexual means’

Multiple choice botany plants in daily life types of wood importance of plants secondary growth in stem

In those plants whose pulp is of economical importance,
they are generally propagated by vegetative means because

  1. It is cheaper

  2. It is more economical

  3. The pulp quality remains same

  4. The pulp quality becomes better
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

They are generally propagated by vegetative to produce offsprings which are practically clones of their parent plants. If a plant has favourable traits, it can continue to pass down its helpful genetic information to its family. This is especially economically advantageous as it allows commercial growers to clone a particular plant to ensure consistency throughout their crops.

Thus, the correct answer is C.

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

Best method to preserve the wild relatives of plants is

  1. By growing them in natural habitats

  2. Gene library

  3. By storing seeds

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

The genetic material from wild varieties can be preserved either in gene banks or in-situ preservation. Gene bank saves the genes and other regenerative material from a wide range of plants. In-situ, is the preservation of wild variety of plants in the fields and forests where they grow. Thu, the correct answer is option A.