Which statement is best supported by the results of this experiment? a. several proteins are involved in dna replication b. the two dna strands are replicated in opposite directions c. cell division produces four identical dna strands d. dna replication is a semiconservative process

The correct answer would be D. DNA replication is a semiconservative process.

It shows the semi-conservative method of DNA replication.

In this method, the two strands get separated first and then each strand is used as a template for the synthesizing a new strand.

The two identical daughter DNA molecules are formed, each having one parental strand and one newly synthesized strand.

The same can be observed in the given figure that is, each of the two daughter DNA molecules is made up of blue (parental strand) and orange (newly synthesized) strands.

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.