The coded information of a DNA molecule is determined by the A .sequence of amino acids.

B .number of enzymes.

C. sequence of sugar-phosphate units

D. sequence of nitrogenous bases. ​

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere, b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify, d)anaerobic bacteria kept thriving with more oxygen

What do we call an individual that has inherited two identical alleles for the same trait? a. homozygous b. heterozygous c. monozzygous

How many electrons can occupy any electron orbital?