Explain the role of the ozone layer in sustaining life on earth.

Ozone is a layer of gas in the atmosphere that is represented by O₃. It has an essential role in sustaining life forms on earth. It prevents the harmful ultraviolet rays ( that come from sun) to reach the earth. These radiations are absorbed by ozone layer and therefore it acts like a protective shielding layer for the planet earth.

Harmful UV radiation can otherwise cause damage to the life forms ( like sun burns, skin cancer).

Thus, it helps in sustaining life forms.

"griffith's experiment discovering the "transforming principle" in pneumococcus bacteria. griffith's experiment, reported in 1928 by frederick griffith, was the first experiment suggesting that bacteria are capable of transferring genetic information through a process known as transformation." - griffith's experiment.