Which of the following regarding countercurrent exchange is false? select one: a. heat flow does not cease when temperatures nearly equalize. b. liquid cools while moving in one direction and warms by moving in the opposite direction c. countercurrent heat exchange occurs only when the opposite flow of adjacent fluid maximizes heat transfer. d. the blue fin tuna employs countercurrent exchange by taking in cold water through the mouth and into the gills, which in turn keeps the orga roughly the same temperature as the water.

the most logical answer would be a

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.

c is the correct answer!