Question

54. Atrial and branchial apertures of Herdmania are surrounded by
(A) Two lips
(B) Three lips
(C) Four lips
(D) Five lips​

Answer 1

Answer:

Hi..

Explanation:

The atrial and brachial siphons are the protuberances on which atrial and brachial apertures are situated. Both of them are surrounded by four lips each. So, the correct answer is ' four Lips'.

C Four lips

Answer 2

Answer:

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