I believe the answer is A!
Building models doesn't actually help scientists observe phenomena. Scientists build models to describe how nature and systems operate then make observations to see if their models match what they observe. Models which don't match what they observe are either alterated or scrapped. Good models are kept and used by the scientific community.
It is only one nuclei in a cell
Answer:
hhhh and I have a good feeling or a better understanding than we have in our current age range of speech in
Hormones and water balance are another two conditions which are maintained by cells.
