Question

(I) In humans urea is produced as waste by the

1 Digestion of food
2 Respiration
3 Decomposition of

(ii) The two major waste products produced by our body are

1 CO2 and urea
2 Oxygen and water
3 None

(iii) ________ are the tubes which carry urine from kidneys to the bladder

1 Urethra
2 Ureters
3 Capillaries

(iv) The process of removal of toxic wastes from the body of an organism is called

1 Respiration
2 Excretion
3 Transport

(v) The main waste products produced by plants are

1 Hydrogen,carbon
2 dioxide and gum
3 Nitrogen,CO2 and water vapour
Oxygen ,CO2 and water vapour

(vi) The procedure used for cleaning the blood of a person by separating waste substance from it is called

1 Dialysis
2 Bryolysis
3 None​

Answer 1

Answer:

i)digetion of food

ii)CO2and urea

iii)ureters

iv)excretion

v)carbon dioxide and oxygen

vi)dialysis

Answer 2

1: Digestion of food
2: CO2 and urea