The common carotid arteries and the vertebral arteries
Answer:
antigens
Explanation:
a vaccine may contain that
The term is called THEORY.
In scientific investigation, a theory is a well substantiated explanation of how a particular phenomenon works based on the set of facts which had been repeatedly confirmed through observations and experiments. A scientific theory gives reliable account of a phenomenon.
Answer:
They orbit around the nucleus of an atom.
Explanation:
Protons are located inside of the nucleus. Electrons orbit the nucleus.
