''Amazon forest is considered to be the lungs of the planet'' - Justify this statement.

Amazon rainforests are considered as 'lungs of the planet' as they contribute______of the total oxygen in the earth's atmosphere. (a) 10 % (b) 15 % (c) 20 % (d) 30 %

Water is an amphoteric oxide. Justify this statement.

Birds are glorified reptiles. Justify the statement.

Ice is less dense than water at 0^(@)C . Justify this statement.

Suflower is not a flower. Justify the statement.