(D)an atom can join with other kinds of atoms.
Basically he explained what a molecule is.
Pericardium is a membrane that surrounds the heart and the roots of the blood vessels. It is composed of two layers: the serous layer and the fibrous layer.
The Pericardium keeps the heart in place and in proper working order. Any disorders that occurs in the pericardium will also affect how the heart works.
Inflammation of the pericardium may be a result of infection, heart attack, heart surgery, and other medical side effects.
the (drug and control) are the variable that you will change throught the conducted investigation.
I think the answer in this is c because it shows how the scientist worked in feilds
There are 23 pairs chromosomes in the human cell.
