Tag: asexual modes of reproduction

Questions Related to asexual modes of reproduction

In grafting the rooted plant is used as a ______.

  1. Scion

  2. Stock

  3. Stem

  4. Root


Correct Option: B
Explanation:

In grafting, two firmly related plants are utilized to deliver another plant that has the ideal, consolidated attributes of both the parent plants. One plant is the stock, where the root system is taken and where the shoot system is used is called the Scion,

So, the correct option is 'Stock'.

In vegetative reproduction, when two different individuals participate then it is called, _________?

  1. Layering

  2. Grafting

  3. Cutting

  4. Doubling


Correct Option: B
Explanation:

  • In grafting, two firmly related plants are utilized to deliver another plant that has the ideal, consolidated attributes of both the parent plants. One plant is, 
  • where the root framework is taken and the other is, where the shooting framework is utilized. The scion is appended to the load of the second plant in this strategy for fake vegetative proliferation. grafting can be done in plants like roses, apples, and avocado.

So, the correct option is 'Grafting'.

The part of the plant where metabolism takes place is

  1. Aerial

  2. Sub-aerial

  3. Underground

  4. All the above


Correct Option: A
Explanation:

Plant metabolism involves the complex of physical and chemical events of photosynthesis, respiration, and the synthesis and degradation of organic compounds. These processes are seen to occur in the aerial parts of the plant. So, the correct option is 'Aerial'.

The cut part of plant stem used in the process of grafting is:

  1. Stock

  2. Scion

  3. Cutting

  4. Bud


Correct Option: A
Explanation:

The stem part of the plant used in grafting is called as the stock.

Which of the following defines phytotron?

  1. Fish culture facility

  2. Plant hormone

  3. Secondary metabolite

  4. Controlled plant culture facility


Correct Option: D
Explanation:

A phytotron is an enclosed research greenhouse used for studying interactions between plants and the environment. It was a product of the disciplines of plant physiology and botany. The first phytotron was built under the direction of Frits Warmolt Went at the California institute of Technology in 1949. It was funded by the Harry B. Earhart Foundation and was officially known as the Earhart plant research Laboratory.

In vegetative reproduction when two different individuals participate then it is called ______________.

  1. Layering

  2. Grafting

  3. Cutting

  4. Doubling


Correct Option: B

Roses and banana are usually grown through ...............

  1. Parthenocarpy

  2. Cuttings

  3. Grafting

  4. Layering


Correct Option: B
Explanation:

Plants can reproduce asexually and sexually. The vegetative reproduction is a means of rapid propagation, as sex cells are not involved, the progeny is identical to parent plant and the process is a type of asexual reproduction. Vegetative reproduction can be natural or artificial (cutting, layering, grafting or use of stocks). Cutting is commonly used artificial method of vegetative propagation. In cutting a cut portion of a plant generates a whole new plant as in Rose, Bougainvillea, Banana etc. Banana is a large perennial herb propagated vegetatively rather than sexually because nearly all cultivated varieties are seedless, and fruits develop parthenocarpically (in the absence of seed development). The principal method of banana propagation is division of suckers or pups which arise from the base of the main stem or from the underground corm. Large suckers are the preferred planting material. These are removed from vigorous clumps of banana trees with a spade when at least three feet tall, during warm months.

During plant grafting, connection is made between stock and scion 

through ...................

  1. Xylem

  2. Phloem

  3. Cambium

  4. Tissue


Correct Option: C
Explanation:

Grafting is a type of artificial vegetative propagation in plants. In grafting, a shoot of one plant (scion) is attached to shoot of another plant (stalk). The scion and shoot join to each other with the help of vascular cambium.

The upper stem portion is ...............

  1. Stock

  2. Scion

  3. Tiller

  4. Twiner


Correct Option: B
Explanation:

The vegetative reproduction is a means of rapid propagation, as sex cells are not involved, the progeny is identical to parent plant and the process is a type of asexual reproduction. Vegetative reproduction can be natural or artificial (cutting, layering, grafting or use of stocks). Grafting is commonly used artificial method of vegetative propagation. In grafting cut stem end (scion) of one plant is artificially tied using wet clay to another obliquely cut stem (stalk) which is still attached to roots. The cambial activity in the stalk and scion later on establishes a vascular link between two plants. Arguably the process is possible because plants lack a well developed immune system which can reject foreign grafts.

When a branch under soil develops roots, it is known as ..........

  1. Grafting

  2. Layering

  3. Cutting

  4. None of the above


Correct Option: B
Explanation:

Plants can be propagated vegetatively without involving the process of sexual reproduction. The vegetative propagation can be natural or artificial. With the objective of improving crops and ornamental plants, humans have devised various methods for asexual propagation of angiosperms. Most of these methods are based on the ability of plants to form adventitious roots or shoots. Cutting, layering, grafting, cloning are few such methods. The layering process refers to growth of roots by vegetative structure of stem when covered by a layer of soil.