Why can't water pass through a cell membrane? -All of these are true.
-The lipid part of a phospholipid is hydrophobic and repels water.
-They can, if they have a channel protein to help them across.
-Water is polar and the lipids are non-polar so they repel each other.

Ineed to know why d is the correct answer asap

The endoplasmic reticulum (er) is an organelle in some cells. in these cells, it is continuous with the nuclear membrane and forms a large part of the cell\'s total membrane. sort the phrases below as describing rough er, smooth er, both, or neither. note: if you answer any part of this question incorrectly, a single red x will appear indicating that one or more of the phrases are sorted incorrectly.1) found in prokaryites and uekaryotys2) involved in protein synthesis3) involve in lipid synthesis4) contains molecular chaperones in lumen5) bound with ribosomes6) involved in toxin or drug metabolism7) large systemot internnected tubules,vesicles, and sacs8) "packages" enzymes in vesicles for secretion.

How does friction with the atmosphere affect the speed of an artificial satellite