Tag: asexual modes of reproduction

Questions Related to asexual modes of reproduction

Salamander and Axolotl larva regenerate

  1. Limbs, eye structures and intestine

  2. Jaws and external gills

  3. Both A and B

  4. Trunk


Correct Option: C
Explanation:

Formation of new parts of the body, which are lost due to injury or accidents is called Restorative regeneration. In Salamander and Axolotl larvae regenerate Limbs, eye structures and intestine, jaws and external gills. It is called restorative regeneration.

So, the correct option is ‘Both A and B’.

Regeneration was discovered by

  1. Trembley

  2. Morgan

  3. Huxley

  4. Lamarck


Correct Option: A
Explanation:

Formation of new cells or tissues in the body organs is called Regeneration. It is first discovered in hydra by Abraham Trembley.

So, the correct option is ‘Trembly’.

What is true about regeneration?

  1. Beak in birds

  2. Tails in lizards

  3. Fish fins

  4. All the above


Correct Option: D
Explanation:

Formation of new cells or tissues from injured parts of the body is called Regeneration. It occurs in plants as well as animals. Regeneration of Beak in birds, tails in lizards, fish fins are best examples of regeneration.

So, the correct option is ‘all the above’.

Restorative regeneration is common in

  1. Vertebrates

  2. Mostly invertebrates

  3. In some vertebrate groups

  4. In some invertebrate groups


Correct Option: D
Explanation:

Formation of new parts of the body, which are lost due to injury or accidents is called Restorative regeneration. It is found in invertebrates.

So, the correct option is ‘in some invertebrate groups’.

Morphallaxis is

  1. Reconstruction of the whole body

  2. Growth of lost limb

  3. Healing of injury

  4. Regeneration with the help of blastema


Correct Option: A
Explanation:

The reconstruction of an entire animal from a small fragment by reorganizing the existing cells, is called Morphallaxis. The regenerated animal is far smaller than the original one after the completion of the process. It grows to attain the normal size. eg:Hydra.

So, the correct option is ‘Reconstruction of the whole body’.

Restorative regeneration decreases with

  1. Increase in complexity of organisation

  2. Decrease in organisational complexity

  3. Development of hormones

  4. Development of nerves


Correct Option: A
Explanation:

Formation of new parts of the body, which are lost due to injury or accidents is called Restorative regeneration. It decreases with increase in complexity of body organisation.

So, the correct option is ‘increase in complexity of organisation’.

Factors controlling regeneration seem to be

  1. Neural

  2. Hormonal

  3. Both neural and hormonal

  4. Genetic


Correct Option: C
Explanation:

Formation of new cells or tissues from injured parts of the body is called Regeneration. It is controlled by epithelial cover, neural trophic factor, and hormones like adrenal and pituitary glands.

So, the correct option is ‘Both neural and hormonal’.

Mammals can regenerate

  1. Brain

  2. Liver

  3. Lung

  4. Urinary bladder


Correct Option: B
Explanation:

Formation of new cells or tissues from injured parts of the body is called Regeneration. It occurs in plants as well as animals and human beings.  In human body, the only organ performs regeneration is liver.

So, the correct option is ‘Liver'.

The ability of animals to regenerate lost part was first reported by

  1. Patten

  2. Trembley

  3. Storer

  4. Garison


Correct Option: B
Explanation:

The ability of animals to regenerate lost parts is called regeneration. This was first reported by Abraham Trembely.

So, the correct option is ‘Trembely’.

Accumulation of cells and formation of a bud at the site of amputation is

  1. Morphallaxis

  2. Reparative bud

  3. Blastema

  4. Both A and B


Correct Option: C
Explanation:

A.Morphallaxis - The reconstruction of an entire animal from a small fragment by reorganizing the existing cells, is called Morphallaxis.

B.Reparative bud - Regeneration of buds  in multicellular organisms is called reparative bud.

C.Blastema – A stumpy outgrowth or bulge or formed, by the accumulation of cells, during regeneration of injured part is called Blastema. It is one of the important step in the process of regeneration.

So, the correct option is ‘Blastema’.