An example of communication between cells of human body systems is the "fight, flight or freeze" response. The physiological responses enable
the body to deal with extraordinary situations. Use the chart on the left
to determine which two systems would work together in a night
response such as almost jumping out of the way of a car. What two systems are being used?

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.

Resperation is a way to release carbon back into the atmosphere

Which particle controls what element an atom is?