Answer:
thus buds that eventually grow into arms and legs are formed in 1st month of pregnancy
It would be #2 because it dosent have those specific antigens to defend the pathogen.
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.
Cells mainly divide to help living organisms grow.<span />
