Question

Choose the correct option in each of the following
1. Fish derive oxygen from
a) water because it is a compound of hydrogen and oxygen
b) the soil below water
the dissolved air
d) the atmospheric air
2. Air occupies space and has
(a) colour
(b) smell
(c) mass
(d) none of these
3. Which of the following constituents of air is used in photosynthesis?
(a) Nitrogen
(b) Oxygen
fal Carbon dioxide
(d) Dust​

Answer 1

Answer:

1;a

2;c

3;c

Explanation: