ANSWER: If the atom has more electrons than protons, it is a negative ion, or ANION. If it has more protons than electrons,it is a positive ion.
D! The Cell membrane in found in all cells, and it is a single (mono) layer.
B. because it is dependent on something to manipulate (change) it, that is why it is called a dependent variable :)

the answer is d.pacific ocean is the largest ocean in the world it is also the world's deepest ocean.