Answer:
A
Explanation:
Today, the atmosphere holds about 21 per cent oxygen. ... When the first simple organisms appeared in the oceans more than 3.5 billion years ago, the atmosphere was mostly nitrogen, hydrogen, water vapor, and carbon dioxide
The aa genotype should
a*a = 0.4 * 0.4 = 0.16
Answer:
Go over to the panicked people and ask what happened.
Explanation:
I hope this helps you!