Though plants are exposed to Sun throughou1 the day. But they don't burn. Explain.

Plants make their own sunscreen. The phenolic compounds in plants (its a natural chemical) acts as a sunscreen. It absorbs UV rays. Plants also protect themselves using a protein known as UVR8 (short for UV resistance locus 8). Plants that lack UVR8 cannot induce protective sunscreens and are severely damaged by the UV present in summer sunlight.