Answer:
The sympathetic nervous system is involved in preparing the body for stress related activities; the parasympathetic nervous system is associated with returning the body to routine, day-to-day operations. The two systems have complementary functions, operating in tandem to maintain the body's homeostasis.
Answer:
D
Explanation:
polysaccharides is NOT one of the four main groups of macromolecules of living things
Circulatory system.....circulates blood (a vital delivery system of oxygen) throughout the whole body when tissues need it the most and with a constant supply.
Hi,
The answer should be letter B, as H2O is a compound made of two different elements in a definite proportion.
They are distinguished by proteins on the erythrocytes.
