Answer:
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
Explanation:
Answer:
I think the answer is C. regulation.
Explanation:
I hope this helps! Correct me if I am wrong.
Leads to deforestation, pollutes water from waste dumping, air pollution as well, less biodiversity
The answer is the first choice: Blue Eyes.
Polygenic traits are those controlled by two or more genes (hence the name "poly" in the term). Other examples would be skin color and height.
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The part of an atom that is mostly empty space is the electron cloud
