NEET Biology question

According to one of the most widely accepted theories, earth's atmosphere before the origin of life was

(A)Oxidizing
(B)Oxidizing along with
(C)Reducing with free in small amount
(D)Oxygen absent in the formCorrect

Answer: (D)

Solution

The primitive earth's atmosphere, before the origin of life, is believed to have been strongly reducing and to have contained no free oxygen at all: hydrogen, carbon and nitrogen could not exist in the free state and so combined into compounds such as methane

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-121687