Question

Which of the following animals can regenerate arms and parts of the body?
(i)Starfish
(ii)Brittle star
(iii)Sea lily
(iv)Aves
(a) (i), (ii), and (iii)
(b) (i) and (ii)
(c) (ii) and (iv)
(d) (i) and (iii)

Answer 1

This is often the group of warm-blooded vertebrates characterized by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high rate, a four-chambered heart, and a robust yet lightweight skeleton.

Complete step by step answer:
The starfish, brittle star, and sea lily can regenerate arms and parts of the body. Some parts of our bodies can repair themselves quite well after injury, but others don’t repair in the least. We certainly can not regrow a whole leg or arm, but some animals can regrow or regenerate the whole body parts. There are many animals that can regenerate complex body parts with full function and form after injury. After Injury, stem cells accumulate at the injury site during a structure called the blastema and begin dividing to rebuild the missing part.

So, the correct answer is,’(i), (ii), and (iii)’.

Additional information: -To replace those parts of the body that have been damaged, many animals can regenerate or regrow or replace with the new one.
-The organisms belong to the echinoderms can regenerate missing limbs, arms, spines, and even intestines too, for example, sea cucumbers.
-Some brittle stars and also some sea stars can reproduce asexually by breaking a ray or arm and also by deliberately splitting the body in half.
-Then each half can grow into a whole new animal. Planarians are called flatworms which when cut into pieces, each piece can grow into a new worm.
-Sea cucumbers have bodies that bear the capacity to grow up to three feet long and thus show the phenomena of regeneration. Spiders can also regrow missing legs or parts of the legs.
-Sponges can be divided that means the cells of the sponge can regrow and become exactly the same as before. In starfish, if it loses an arm can grow new ones, but sometimes an entire animal body can be regenerated or regrow from a single lost arm.
-But it has been observed that this ability of regeneration is lacking in birds or organisms belongs to the group Aves.

Note:
-We human beings certainly can not regrow a whole leg or arm, but some animals can regrow or regenerate the whole body parts.
-After the Injury, stem cells accumulate at the site of injury in a structure called the blastema and start dividing to rebuild or regenerate the missing part.
-The organisms belong to the echinoderms can regenerate missing limbs, arms, spines, and even intestines too, for example, sea cucumbers.
-To replace those parts of the body that have been damaged, many animals can regenerate or regrow or replace with the new one.