The same way humans do:
By breathing in oxygen and then it goes into the system and filters through and they get CO2 as a waste product just like us!
Answer: Plant cells have a cell wall, and chloroplasts. Animal cells don't.
Explanation:
<span>The independent variable is the part of the experiment that the researcher makes changes or adjustments to. This allows for differences in the dependent variable, which is usually the result that the independent variable is considered to (in)directly work on.</span>
D is the right for the question I guess and I got it right