Question

Excretion is
(a) removal of essential substances not required
by body
(b) removal of useless substances present in
excess
(c) formation of substances having some role in
body
(d) all

Answer 1

Answer:

(b) removal of useless substances present in

excess

Answer 2

Answer is option "b"

Explanation:

• Excretion is the process by which the body gets rid of waste products and the nitrogenous by-products of metabolism. Through excretion, organisms control osmotic pressure, the balance between inorganic ions and water, and maintain acid-base balance. The process thus promotes homeostasis.
• Excretion is the disposal of overabundance particles, water, and metabolic squander from the body. As in all life forms, excretion in creepy crawlies serves to advance the suitable guideline (homeostasis) of the intracellular condition as the way to organismal prosperity and endurance.
• Hence, the right answer is option b "removal of useless  substances present in excess."