Question

the Kidneys in human beings are a part of the system for


(a) Nutrition (b) Respiration (c) Excretion (d) Transportation



2. During respiration exchange of gases take place in


(a) trachea and larynx (b) alveoli of lungs (c) alveoli and throat (d) Lungs and larynx



3. Which the following is transported by xylem tissues?


(a) food (b) water (c) amino acids (d) oxygen



4. Depletion of ozone is mainly due to


(a) chlorofluoro carbon compound (b) carbon monoxide (c) methane (d) Carbon tetra chloride​

Answer 1

Answer:

1. c) Excretion
2. d) Lungs and larynx
3. b) Water
4. All of the above.

Explanation:

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Answer 2

Answer:

1) c 2) b 3) b 4) a

Explanation:

1 ) as we know that kidneys excrete nitrogenous wastes from blood such as urea , its functions as excretory organ so EXCRETION.

2) exchange of gases takes place in air sacs , called