The correct answer is: 3. used math to improve the focus of the lens
Answer: sewage in water and factory waste
Explanation:that’s my guess
Explanation:
The major blood vessels that are connected to the heart include the aorta, the superior vena cava, the inferior vena cava, the pulmonary artery (which takes oxygen-poor blood from the heart to the lungs, where it is oxygenated), the pulmonary veins (which bring oxygen-rich blood from the lungs to the heart) and the coronary arteries (which supply blood to the heart muscle).
Because mutations do not always result in an amino acid change.
