Question

Define the terms and give one example of each
(a) Bilateral Symmetry
(b) Coelom
(c) Triploblastic​

Answer 1

Answer Define the terms and give one example of each (a) Bilateral symmetry (b) Coelom (c) Triploblastic Answer: (a) The animals with bilateral symmetry are put in group bilateria. The body can be divided into two identical right and left halves in only one plane, e.g., annelids, arthropods, etc. (b) Coelom is the body cavity present between the body wall and the gut wall.

Answer 2

Bilateral Symmetry

In bilateral symmetry there are the same three axes as in biradical symmetry but only one pair of symmetrical sides, the lateral sides, since the other two sides, called the dorsal (back) and ventral (belly) surfaces, are unlike. Examples of animals that possess bilateral symmetry are: flatworms, common worms ("ribbon worms"), clams, snails, octopuses, crustaceans, insects, spiders, brachiopods, sea stars, sea urchins, and vertebrates.

Coelom

Coelom is the internal body cavity of most of the triploblastic animals which lie between body wall and visceral organs and is formed by the splitting of mesoderm into outer and inner layers. Example : Earthworm, chordates.

Triploblastic​

The animals having three primary embryonic cell layers viz., the ectoderm, mesoderm and endoderm from which different tissues and organs of the animal's body differentiate out. Example: Frog.