A(n) solution has a higher concentration of water and lower concentration of solute than the cell placed in the solution.

Answer : A hypotonic solution has a higher concentration of water and lower concentration of solute than the cell placed in the solution.

Explanation :

Solution : It is made up of the combination of amount solute and solvent.

Isotonic solutions : It is defined as the solutions in which the concentration of solute inside the cell and outside the cell is same.

Hypotonic solutions : It is defined as the solutions in which the concentration of solute inside the cell is lower than outside the cell.

For example : Diluted sugar syrup

Hypertonic solutions : It is defined as the solutions in which the concentration of solute inside the cell is higher than outside the cell.

For example : Concentrated sugar syrup

Hence, a hypotonic solution has a higher concentration of water and lower concentration of solute than the cell placed in the solution.

Two molecules that can cross a lipid bilayer without help from membrane proteins are oxygen and carbon dioxide. The property that allows this to happen is that both oxygen and carbon dioxide molecules are nonpolar which means that they can pass easily through the hydrophobic part of the membrane. The lipid bilayer is present in all cell membranes. It consists of two layers of the fat cells which are arranged into two sheets. It functions as a barrier which marks the boundaries of the cell. The inner part of a lipid bilayer is nonpolar since it is composed of the hydrophobic end of the phospholopids.