Tag: reproduction in animals

a)Type of regeneration in Hydra is known as epimorphosis is false, because it is Morphallaxis.

b)Members of reptiles such as lizards exhibit autotomy are true.

c)Regeneration of limb in amphibians involves morphallaxis is false because it is a epimorphisms.

So, the correct option is ‘a and c are false but b is true’.

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 ‘Every fragment will grow into complete Hydra’.

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. In Hydra, morphallaxis takes place by intestinal cells.

So, the correct option is ‘Morphollaxis by intestinal cells’.

A.Morphogenesis – Formation of organs from the embryo is called Morphogenesis or organogenesis.

B.Epimorphosis - Regeneration of limbs or tail is an epimorphosis regeneration. Replacement of lost organ of the body by proliferating new cells from the surface of the injured part is called Epimorphosis.

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

D. Accretionary growth – It involves a cell secretion to increase the volume of the extracellular spaces. Many adult tissues will only divide when induced by injury or other stimuli. It occurs in cartilage and bone.

So, the correct option is ‘Morphallaxis’.

Formation of new cells or tissues from injured parts of the body is called Regeneration. The greatest ability for regeneration is found in Planaria.

So, the correct option is ‘Planaria’.

A.Morphallaxis – Regeneration of two transversely cut equal pieces of one Hydra into small Hydras is true.

B.Epimorphosis – Replacement of old and dead erythrocytes by the new ones is false because The regeneration of tissues or organs through the dedifferentiation of existing, differentiated adult tissues is called Epimorphosis.

C.Morphallaxis – Healing of wounds in the skin is false, because, The reconstruction of an entire animal from a small fragment by reorganizing the existing cells, is called Morphallaxis.

D.Epimorphosis – Regeneration of crushed and filtered out pieces of Planaria into as many new planarians is false, because The reconstruction of an entire animal from a small fragment by reorganizing the existing cells, is called Morphallaxis.

So, the correct option is ‘Morphallaxis – Regeneration of two transversely cut equal pieces of one Hydra into small Hydras is true’.

The spontaneous removal or casting off of a body part, especially when the organism is injured or under attack is autotomy or self ampulation. It is recorded in loss legs in crabs, loss of tails in lizards, loss of viscera in Holothurian echinoderms.

So, the correct option is ‘Lizzards’.

a)Type of regeneration in Hydra is known as epimorphosis is false, because it is Morphallaxis.

b)Members of reptiles such as lizards exhibit autotomy is true.

c)Regeneration of limb in amphibians involves morphallaxis is false because it is an epimorphism.

So, the correct option is ‘a and c are false, but b is true’.

The spontaneous removal or casting off of a body part, especially when the organism is injured or under attack is autotomy or self amputation. It is recorded in loss legs in crabs, loss of tails in lizards, loss of viscera in Holothurian echinoderms.

So, the correct option is ‘Tail’.

A. Fish - can regenerate almost any part of their central nervous system.

B.Amphibia – can regenerate their limbs.

C.Birds – regenerate their hair cells, feathers.

D.Sea cucumber - can regenerate entire alimentary canal.

So, the correct option is ‘ Sea cucumber’.