One night Katrina was studying the position of the stars and the Moon in the sky, She made a sketch of the position of the Moon in the sky, as shown in the figure, What is the reason for this movement of the Moon in the sky?

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.

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell