House martins (depicted on the right) feeding their young in the nest are clear examples of central-place foragers. Imagine that a house martin travels to two different patches to collect meals for its chicks. The patches are identical except that one is farther from the nest. According to the marginal value theorem, which statement best describes how an optimally foraging house martin should behave? A. It should stay longer in and collect a larger load from the closer patch.
B. It should stay longer in and collect a smaller load from the closer patch.
C. It should stay longer in and collect a larger load from the more distant patch.
D. It should stay longer in and collect a smaller load from the more distant patch. Submit

I think the answer is

C.

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.