Alab technician is trying to determine how a certain chemical affects a group of cells. when the chemical is added to the cells, the cells are unable to break down sugar and they die of starvation. what organelle does the chemical most likely attack?
a. chloroplasts
b. lysosomes
c. vacuoles
d. mitochondria

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.

Which of these is true for bacteria because they are prokaryotic cells? a. they can engulf body cells in order to make memory cells. b. they must invade viruses in order to reproduce. c. they are much larger than eukaryotic body cells. d. they can reproduce on their own outside of other cells.

Restless tectonic plates move (shift) between one and fifteen centimeters per year month day minute