Question

Real organs are absent in

• A. Mollusca
• B. Coelenterata
• C. Arthropoda
• D. Echinodermata

Answer 1

The correct option is B

Coelenterata

The correct option is B.

Explanation for the correct option:

1. They are aquatic or marine organisms and have radially symmetrical bodies.
2. They have tissue-level organization and tentacles to catch prey.
3. As they have tissue-level organizations, no organs are formed. That's why real organs are absent in Coelenterata

Explanation for the incorrect option:

Option A:

Mollusca have organ level organizations

Option C:
Arthropoda has organ-level organizations. They have different organs for different functions.
Option D:
Echinodermata have organ-level organizations. Various functions are performed by various organs.
Final Answer:
Real organs are absent in Coelenterates.