The role of the chordae tendineae is to open the av valves at the appropriate time. true or false?

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.

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

Which units ate used to measure both velocity and speed? check all that apply