Answer:go on google to search it up
Explanation:
I would say D and A are your answers :)
Answer is: the part of an experiment that stays the same though out the experiment is constant.
<span>Constant is a quantity that does not change.
</span>Experimental variable<span>, which is the also part of an experiment, is affected by the experiment (have change).</span>
All eukaryotic cells have Membrane bound nucleus while Prokaryotes don't.