You are relaxing on vacation and watching tv. the commercials show steaming and cheesy pizzas, which makes your mouth water and stomach growl. this is because you are under the influence of your:
a. sympathetic and parasympathetic system
b. sympathetic system
c. parasympathetic system
d. entire autonomic nervous system

Which element provides strength to the exoskeleton of clams and oysters

List two limitations of natural selection

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.