Which of the following best describe the main function of the cyrculatori system ? a. to deliver nutrients an other essential material to cells an remove waste products

b. to break down the nutrients found in food so that they can be used by all cells in the humand body

c. to produce the chemical signals that allow parts of the humand body to communicated over long distances

d. to coordinate all others humand body system so that they can function together to maintain homeostaisis

Consider the following system at equilibrium. caco3(s) ca2+(aq) + co32–(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? ccl4 co2 cuso4 na2co3

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?