Chemical reactions are how new forms of matter are made. While nuclear reactions also may produce new matter, nearly all the substances you encounter in daily life are the result of chemical changes. Chemical reactions help us understand the properties of matter
The first one, cause their trying to make it a positive way to reinforce. Which just means their trying to fix something again
Eukaryotes contain linear chromosomes and therefore require telomerase to prevent loss of the ends of the chromosomes
Muscle tissue is responsible for both voluntary and involuntary movements.
Do you want the catholic answer or do you just want a general answer, because it could be an opinion.