Question

Spicule producing cells of sponges are

• A. Spongioblasts
• B. Calcoblasts
• C. Silicoblasts
• D. Both B and C

Answer 1

The correct option is D Both B and C

Spicules are the structural elements in skeleton of sponges. In sponges, skeleton elements are formed by scleroblasts. Scleroblasts may be of following types:

1. Calcoblasts: Scleroblasts that secrete calcareous spicules.

2. Spongioblasts: Scleroblasts that secrete spongin fibres.

3. Silicoblasts: Scleroblasts that secrete siliceous spicules.

Hence, spicule producing cells of sponges are Calcoblasts and Silicoblasts.

So, the correct answer is 'Both B and C'.