Study the image.
which description best describes the parts of the molecule?
a is the polar, hydrophobic end.
b is the nonpolar, hydrophilic end.
a is the nonpolar, hydrophilic end.
b is the polar, hydrophobic end.
a is the polar, hydrophilic end.
b is the nonpolar, hydrophobic end.
a is the nonpolar, hydrophobic end.
b is the polar, hydrophilic end.

A is the polar, hydrophilic end.

B is the nonpolar, hydrophobic end.

Explanation:

This type of molecule is mainly used to make cell membranes. The polar, hydrophilic end interracts with the inner and outer environments of the cell (the cell membrane is usually a bi-lipid layer) because they are mainly water. The nonpolar, hydrophobic end is sandwiched in between the hydrophilic ends away from water.

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.

the answer is :