Which of the following was most likely to hav | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The primordial atmosphere of the Earth was reducing in nature.It contained gases like $CH_4$,$NH_3$,$H_2$,and water vapor.Free oxygen $(O_2)$ was

Vedclass · Accepted Answer

$O_2$

Vedclass · Answer

(A) The primordial atmosphere of the Earth was reducing in nature.It contained gases like $CH_4$,$NH_3$,$H_2$,and water vapor.Free oxygen $(O_2)$ was absent because it was highly reactive and would have immediately combined with other elements to form oxides.Oxygen was later released into the atmosphere by photosynthetic organisms (cyanobacteria) during the process of oxygenic photosynthesis.

Which of the following was most likely to have been absent in free form in the primordial atmosphere at the time of the origin of life?

Similar Questions

The gases used in the spark-discharge apparatus were

In the experiment conducted by Urey and Miller and similar experiments, which of the following components were obtained at the end?
$I -$ Sugars, $II -$ $DNA$, $III -$ Amino acids (Proteins), $IV -$ Nitrogen bases
$V -$ Pigments, $VI -$ Fats

Cyanobacteria originated about how many years ago?

Abiogenesis occurred about how many billion years ago?

The presence of salts ($NaCl$ and others) in animal body fluid gives an inference that life originated in the

Vedclass Test Series

Exam Paper Generator

Online Exam Module