Question

Match the columns I and II, and choose the correct combination from the options given.

Column-I	Column-II
a. An plane passing through central axis of body divides the organism into two identical halves
b.Body can be divided into identical cell left and right halves in only one plane.
c. Any plane that passes through the center does not divide them into equal halves.

• A. a-1, b-2, c-3
• B. a-3, b-2, c-1
• C. a-3, b-1, c-2
• D. a-2, b-3, c-1

Answer 1

The correct option is A a-1, b-2, c-3

Animals can be categorized on the basis of their symmetry.
Sponges are mostly asymmetrical, they do not divide in two equal half.
When any plane passing through the central axis of the body divides the organism into two identical halves, it is called radial symmetry. Coelenterates, ctenophores and echinoderms have this kind of body plan.
In animals like annelids, arthropods, body can be divided into identical left and right halves in only one plane, exhibit bilateral symmetry.

So, the correct answer is option-'a'.