The answer is D because, hope this helps
Hello!
DescriptionA scientific theory is an explanation of an aspect of the natural world that can be repeatedly tested and verified in accordance with the scientific method, using accepted protocols of observation, measurement, and evaluation of results. Where possible, theories are tested under controlled conditions in an experiment.
Nucleus
Because that’s where all the chemical cell activity decisions take place
I think methane and propane
Salted butter does not need to be stored in the fridge since the risk of bacterial growth is so low. ... However, it will stay fresh longer if it is kept in the refrigerator. Refrigeration slows down the process of oxidation, which will eventually cause butter to go rancid.
I hope this helps!