Asequence of human cell divisions accompanied by some growth and cell differentiation convert an early into a hollow ball of cells called a

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins

Which mechanism of transport takes place when solute particles move from a region of high concentration to a region of low concentration? active diffusion isotonic osmosis

About __ of the mass of the cell is water