Question

Choose the correct statements regarding bilateral symmetry:
I. This symmetry is advantageous to slow-moving animals. 
II. The animals with this symmetry can respond efficiently to new environments due to cephalization. 
III. The median sagittal plane divides the organism into two antimeres. 
IV. The animals with this symmetry lack a definite body form. 
 

• A. I, III
• B. II, IV
• C. I, IV
• D. II, III

Hint:

Bilateral symmetry allows for the development of cephalization and is advantageous for forward movement and environmental response.

Answer 1

The Correct Option is D

I: This statement is incorrect because bilateral symmetry is typically seen in actively moving animals, not slow-moving animals.
II: This statement is correct. Animals with bilateral symmetry have a well-defined head region (cephalization), which allows them to efficiently respond to their environment.
III: This statement is correct. The median sagittal plane divides the organism into two symmetrical halves, known as antimeres.
IV: This statement is incorrect because animals with bilateral symmetry have a definite body form with a distinct left and right side.
Final Answer:
II, III