Answer:
in the wall of the right atrium of the heart.
Explanation:
The sinoatrial node (SA), consisting of spindle-shaped cells, initiates the electrical activity of the heart. From its location in the right atrium in proximity to the superior vena cava, the electrical activity spreads to the atria, whose cells are larger than those of the SA.
Answer:
B
The second student has not yet seen the same sunrise.
Explanation:
Because as the day goes on, the sunlight shines on places without light as the earth is rotating.
I am pretty sure the answer is
D) Velocity
Glad I could help, and good luck!
AnonymousGiantsFan
<span>Since there is usually more than one codon for an amino acid, a mutation in the third base of a codon
will most likely not cause the wrong amino acid to be put into the chain. </span>
