EVOLUTION
THE ORIGIN OF LIFE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Which of the following was presumably absent from Earth Early atmosphere based on the conditions present at the time?
|
|
Carbon Dioxide (CO2)
|
|
|
Methane (CH4)
|
|
|
Oxygen (O2)
|
|
|
Water(H2O)
|
|
|
Cyanide (CN-)
|
Explanation:
Detailed explanation-1: -Therefore, the gas which was absent at the time of origin of the earth is oxygen.
Detailed explanation-2: -Earth’s original atmosphere was rich in methane, ammonia, water vapour, and the noble gas neon, but it lacked free oxygen.
Detailed explanation-3: -Oxygen was absent in early earth atmosphere.
Detailed explanation-4: -What’s missing? The early atmosphere had almost no oxygen. Gases from Earth’s interior came through volcanoes and into the atmosphere.
Detailed explanation-5: -Hence, oxygen was absent during the formation of earth. So, the correct answer is ‘Oxygen gas’.
There is 1 question to complete.