Choices:
<span>discovery of codons
discovery and extraction of DNA
creation of a model of DNA
creation of Photo 51
Marshall Nirenberg and Heinrich Matthaei's contribution to our current understanding of the genetic code is the DISCOVERY OF CODONS.</span>
Answer:
Explanation:
The kind of air that moves downslope into a valley after sunset in mountain areas is cool air. This phenomenon is also known as mountain breeze, and it occurs when mountains create moisture through the emision of oxygen and carbon. After sunset, the air in the mountain slopes gets cold.
A. In the blood and the cells lining various tissues of the organs