Which molecule can pass freely through the lipid bilayer?
A) K+
B) Na+
C) O2
D) glucose

Option C) Oxygen is the correct answer.

Explanation:

Oxygen molecule can pass freely through the lipid bilayer. There are some molecules which are soluble in lipids called lipid soluble molecules. Oxygen is soluble in lipids so it can be absorbed by lipid bilayer. Lipid bilayer is present in all cell membrane of cells which helps in the diffusion oxygen from outside environment into the cell which is necessary for the cell.

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.  

the dna of humans and mice is almost 92% similar. this similarity indicates that . mice have a tail, while humans have a tailbone. the tailbone is a structure in humans.yes it's true.