HELP YO BOY OUT‼️‼️‼️‼️‼️

 ok so im so mixed up between A &  C

Explanation: because Deoxyribonucleic acid (DNA) is a molecule that contains the instructions needed for an organism to develop and function. These instructions are stored as a code made up of 4 chemical bases: adenine (A), guanine (G), cytosine (C) and thymine (T). bu its simlier to a gene : segment of a DNA molecule (a sequence of bases) Which that'd be A ...  that codes for a particular protein and determines the traits (phenotype) of the individual. A gene is the basic unit of heredity in a living organism., im pretty sure its C but it could also be A... hope this helps :/. good luck!!

1.the evidene of the reaction

2.yes

3.yes

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.