Question

Choose the incorrect statements regarding Siphonopoda:
I. They show open type of circulatory system.
II. Brain is enclosed in cartilaginous cranium.
III. Some possess ink gland.
IV. Development includes trochophore larva.

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

Hint:

Siphonopoda includes groups like squid and octopuses, which have unique developmental stages and circulatory systems.

Answer 1

The Correct Option is B

Siphonopoda does not have a completely open circulatory system (they are more closed in nature).
Trochophore larvae are not typical of Siphonopoda development, as they have a different larval stage.
Thus, the incorrect statements are I and IV.
Final Answer:
I, IV