CIE Biology Paper-1: Specimen Questions 83 - 84 of 109
Question number: 83
The ………………………. . System is a passive biological system that removes excess, unnecessary materials from the body fluids of an organism, so as to help maintain internal chemical homeostasis and prevent damage to the body.
Growth and development
The excretory system is very important to body. Removing solid waste from body is called excretory system. This system Maintain volume of extracellular fluid, Maintain ionic balance in extracellular fluid, Maintain pH. Excrete toxic by-products such as urea, ammonia, and uric acid.
Question number: 84
Ram set two pots. he put a plant in pot A and pot B is without plant. Both pot have a layer of oil on their surface. Then he left both pots for a week. After one week observation will be- (volume of water at the start of the experiment in both pot-100ml)
Volume of water at the end of the experiment in pot A will increase and in B will decrease
Volume of water at the end of the experiment in pot A will decrease and in B will remain same
Volume of water at the end of the experiment in pot A will decrease and in B will increase
Volume of water at the end of the experiment in pot A will remain same and in B will decrease
In pot A roots of that plant absorb the water for the plant so water level will decrease in pot A and there is no plant in pot B so water level will remain unchanged. This experiment prove that plant take water.