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Question

In which group is there a word which does not belong?
(a) liver, lungs, skin, kidneys
(b) urine, sweat, oxygen, carbon dioxide
(c) butterfly, cockroach, beetle, ant
(d) heart, arteries, veins, capillaries


Solution

(b) urine, sweat, oxygen, carbon dioxide

Urine, sweat and carbon dioxide are waste products; they are eliminated from the body. Oxygen, on the other hand, is not a waste product.

Science
Active Science
Standard VII

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