The two upper parts or chambers of the heart are called Atria's,
they're separated from their lower counterparts the ventricles by an interatrial septum. All the Atria's do is receive blood returning from the heart to the body.
Answer:
A scientific claim can be a prediction that something will happen, based on a scientific theory or a hypothesis
Explanation:
1. substrate
2. active site
3. reaction
Answer:
the capsid is the inner protective layer of the viral genetic information(rna)