A scientist claims that after the first single-celled organisms formed on Earth, conditions would not sustain multicellular organisms for millions of year. Which statement provides the STRONGEST evidence to support this claim

A. Earth's early atmosphere lacked oxygen, which multicellular organisms need to break apart food

B. Earth's early atmosphere lacked nitrogen, which multicellular organisms need to synthesize proteins

C. Earth's surface was much too hot to support liquid water, which multicellular organisms need to survive

D. Earth's surface was much too cold to support liquid water, which multicellular organisms need to survive

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

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.