No they cant be mechanical because then something would have to generate their rays through the inventing of a machine.
Answer:
I believe there are 6
Explanation:
Protons are the positively charged circles (blue)
Neutrons are the Neutral (red)
and the others (green) are called electrons
Answer:
I think its bone, air and hence
Explanation:
I believe your answer would be, it is a non-steroid hormone
A bacteria cell is a prokaryote.
