Which statement about the giraffes explains their evolution based on charles darwin’s main points? a) the closest fossil ancestor to these giraffes would have a very short neck. b)all three of the giraffes have an equal chance of reproducing regardless of the environment. c)as a giraffe reached for food, the giraffe could make its neck longer making it better adapted to the environment. d)long necks were a random genetic change and resulted in the gradual increase of organisms with long necks.

D.Long necks were a random genetic change and resulted in the gradual  increase of organisms with long necks.  

Explanation:

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.