Question

Which of the following may not have been possible without the presence of ozone in the atmosphere?

A) Oxygen may not have been able to accumulate in the atmosphere

B) Photosynthesis may never have developed.

C) Respiration may never have developed.

D) Life may not have been able to move onto Earth’s land surfaces

Answer 1

Answer: Option A) Oxygen may not have been able to accumulate in the atmosphere

Step-by-step explanation:

Ozone, O3, is an allotrope of oxygen having three atoms in the molecule instead of the usual two present in molecular oxygen. Ozone is generated from oxygen, and is the only form in which oxygen can exist in the atmosphere.