Explain how `CO_2` is able to contrl fires.

Explain how soil is formed.

Explain how DNA is isolated from cells.

Explain how can you take care of your eyes .

(a) Explain how some plants are adapted for achieving pollination through insects. (b). Explain how pollination takes place in vallisneria and submerged aquatic plants.

Explain the reaction of CO_(2 on photosynthesis.

Explain how sound is produced by your school bell.