Which one of the following in real sense is not an excretory activity?
(a) Giving out carbon dioxide
(b) Passing out faecal matter
(c) Sweating
(d) Removal of urea.
(c) Sweating option c is correct
The following substances are the excretory products in animals. Choose the least toxic form among them. (a) Urea (b) Uric acid (c) Ammonia (d) Carbon dioxide