Question

Sponges are mostly

• A. Radial
• B. Biradial
• C. Asymmetrical
• D. Bilateral

Answer 1

The correct option is C Asymmetrical

A. In radial symmetry, a number of similar parts radiate out from a central axis. The body of the individual can be cut into equal halves by any plane passing through the centre from top to bottom.

B. In biradial symmetry, the body of the organism can be cut into similar halves by one or two vertical planes only.

C. Asymmetrical organisms can't be cut into equal halves through any plane passing through the body.

D. In bilateral symmetry, the organism can be cut into equal and opposite halves by a lengthwise vertical or saggital plane.

Sponges are generally asymmetrical as their body form vary considerably.

So, the correct answer is 'Asymmetrical'.