How is a cell’s size related to it’s need for nutrients? how does this relationship make larger cells harder to maintain?

The surface area and the volume of the cell plays an important role in uptake or exchange of substances. Surface area refers to the area of the cell exposed to the external environment and the volume refers to the amount of the space within the cell. As the size of the cell increases, the surface area to volume ratio decreases making the process of nutrient intake, exchange and removing unwanted material difficult. It is because, cells depend on diffusion for the process and larger cells show less efficiency in diffusion.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.