Phospholipids make up biological membranes .a. have hydrophobic tails that face outward and are exposed to water. b. None of the choices are correct. c. have hydrophobic heads that face the center of the membrane and are shielded from water. d. remain fluid because they are tightly packed against one another. e. often have "kinks" in their tails caused by the presence of a single rather than a double bond between carbons.

Phospholipids make up biological membranes None of the choices are correct.

Explanation:

Phospholipids make up biological membranes but not having the following  hydrophobic tails that face outward and are exposed to water nor having hydrophobic heads that faces the center of the membrane and are shielded from water nor remaining fluid because they are tightly packed against one another often have "kinks" in their tails caused by the presence of a single rather than a double bond between carbons

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.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.