Answer:
O C. The population's growth rate is increasing exponentially
Answer:
The answer is A: a true nucleus and membrane bound organelles
Explanation:
i did a test and got it right
I only have one reason but hope it helps!
Because without those bases pairing there <span>would be no structure of a DNA.</span>
Animals use the respiratory system to breathe in oxygen and other gases and expel gases like CO2, right? O2 in, CO2 out.