Gases in Earth's Atmosphere. Nitrogen and Oxygen are by far the most common. Dry air is composed of about 78% Nitrogen (N2) and about 21% Oxygen (O2). Argon, Carbon Dioxide (CO2), and many other gases are also present in much lower amounts; each makes up less than 1% of the atmosphere's mixture of gases.
So therefore Oxygen is the gas that makes up the largest portion of the Earths Atmosphere.
Answer:
The answer is B
Explanation:
I Just did the problem in e d g e n u i t y
This is my reason for saying yes
Daughter cells are cells which are genetically identical to parent cells because they have the same type and number of chromesomes
