Question:medium

Study the following and identify the correct statements: I. During inspiration thoracic spiracles are kept closed. II. Oenocytes contain symbiotic bacteria. III. Stomodaeal valve lies between gizzard and mesenteron. IV. Alary muscles keep blood in circulation.

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Alary muscles help maintain haemolymph circulation in cockroach.

Updated On: Jun 17, 2026

I, II
III, IV
I, IV
II, III

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The Correct Option is B

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