Answer:
Explanation:
It is called a double circulatory system because blood passes through the heart twice per circuit. The right pump sends deoxygenated blood to the lungs where it becomes oxygenated and returns back to the heart. The left pump sends the newly oxygenated blood around the body.
Answer:
because protein molecules are very large in molar masses
Answer:
D is the answer
Explanation:
Hydraulic facturing, aka fracking, uses toxic chemicals above some regulations which may lead to a leak into water supplies and therefore contaminate it.
It has not much to do with coal, more to do with oil and natural gases
Because of fracking now making it accessible to reach sources in vast number that were previously unacessible, it leads to decreases in gas prices
Hope this helps :)
It is part of our nervous system and uses stimuli to respond to an event that is happening. The five senses are motor receptors making you move your muscles to respond to that event that is happending
