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Entry Test MCQ :: Homeostasis


21.  Which of the following is most toxic?
A. Ammonia. B. Urea
C. Uric acid D. Trimethylamine oxide

22.  Aquatic animals excrete nitrogenous waste commonly in the form of
A. Ammonia. B. Urea
C. Uric acid D. Trimethylamine oxide

23.  Amount of water required to excrete 1gN of Urea is
A. 1 ml B. 50 ml
C. 100 ml D. 150 ml

24.  Which of the following animal excrete nitrogenous waste mainly as uric acid?
A. Hydra B. Planaria.
C. Humans D. Birds.

25.  Hydra has no specialized excretory system because
A. It does not produce waste material B. Due to absence of mesoderm
C. The whole body cells are in contact with water D. It has pseudocoelom.

26.  Each ach nephridium of earthworm opens to the exterior by
A. Nephrostome B. Nephridiopore
C. Flame cell D. Anus

27.  The nephridia of earthworm open into the coelom by
A. Nephrostome B. Nephridiopore
C. Flame cell D. Anus

28.  Which of the following openings have cilia?
A. Nephrostome B. Nephridiopore
C. Both of these D. None of these

29.  The distal blind end of the malpighian tubules bathes freely in
A. Digestive tract B. Intestines
C. Haemocoel D. Coelom

30.  The main nitrogenous waste formed in the body of earthworm is/are
A. Ammonia B. Urea
C. Uric acid D. Trimethylamine oxide




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