Ms. greene's ecology class compared landsat images of arkansas' loblolly-shortleaf pine forests dated 1985 through 2005. there was an obvious decrease in the square miles of pine forests. all but one reason below would explain this decrease. that is a) fires. b) logging. c) urban sprawl. d) habitat destruction.

Correct A). Fire  

The forest fire is an uncontrolled fire that occurs in nature. Sometimes it is so strong that it takes a lot of time for the firefighter to have control. It results in the huge destruction of vegetation. It is caused by two ways mainly by the lightning or by the human cause. The natural cause of forest fire is sawdust and leaves that are caused by lightning and spontaneous combustion of dry fuel.

Hence, the correct answer would be option A.

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.