Answer: The answer is the last option, Backflow of blood through a defective valve.
Explanation: Hypotension causes high blood pressure, and the other two options are not related to heart murmurs. A hear murmur is when the blood isn't flowing in the right direction causing the hear to beat irregularaly.
Answer:
Reabsorption takes place mainly in the proximal convoluted tubule of the nephron .
Answer:
embryological evidence or fossil evidence. give the answer choices if you can. they are vestigial structures.
Explanation:
C.Adenine and guanine<span> are </span><span>purines in DNA.</span>
