What becomes a problem as a single cell grows larger?
a. cell replication takes longer because there is more cell to copy.
b. it is harder for the cell to move around due to the extra volume and mass.
c. communication among the cell parts becomes less efficient because they are farther apart.
d. the surface area-to-volume ratio makes it harder for the cell to get food and remove waste.

The surface area-to-volume ratio makes it harder for the cell to get food and remove waste.

i was thinking 4.0 v hope this

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.