Because water is a polar molecule, it makes an excellent solvent for atoms and compounds found within cells and tissues. water, acting as a solvent in organisms, aids in all of the following except a. eliminating wastes. b. maintaining turgor pressure. c. constructing cell membranes. d. supplying oxygen and nutrients to cells.

The correct answer is option C- constructing cell membranes.

Explanation:

Life cannot exist without the presence of water as life evolved in the water itself. When life moved from water to land, organisms evolved mechanisms to maintain the water content which organism perform even today. This happens because:

1. Maintain the turgor pressure of the cell through osmosis which controls many important functions in a cell like opening and closing of stomata.

2. Waste elimination- about 95% of urine is water.

3. Supplying oxygen and nutrients- as blood constitutes 55% blood plasma of which 92 % is water.

But the cell membrane or plasma membrane is hydrophobic in composition which separates the internal material from the aqueous environment outside.

Thus, option C- constructing cell membranes is the correct answer.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!