Most animal cell membranes have proteins that pump ions out of the cell and potassium ions into the cell. a) calcium b) carbon c) magnesium d) sodium

Why do carbohydrate molecules function so well as fuel for the body?

A60-tooth gear is connected to a 72-tooth gear.if the smaller gear turns 12 times,how many turns does the larger gear make?

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13