A. Contractile vacuole B. Food vacuole C. Plasma lemma D. All
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A. No separate duct required B. For conservation of water C. For easy removal D. All of these
A. Anterior part B. Posterior part C. Attached to outer surface of intestine D. Integument
A. Pharyngeal B. Integumentary C. Septal D. Meganephridia
A. Septal nephridia B. Pharyngeal nephridia C. Micronephridia D. Meganephridia
A. Flame cells B. Green gland C. Nephridia D. Kidney
A. Urea B. Uric acid C. Ammonia D. Urine
A. Hepatic portal vein B. Renal artery C. Renal vein D. Pulmonary artery
A. Prostomium B. Peristomium C. Clitellum D. Tail