The right answer is James Watson and Francis Crick.
On April 25, 1953, Francis Crick and James Watson described for the first time in a study the structure of DNA (deoxyribonucleic acid), a molecule in the form of a double helix containing the genetic heritage of all life forms. It was with a single-page article published in the British scientific journal Nature that the two young researchers (Crick was 36 years old and Watson only 25) would upset the world of biology and genetics.
At the time, we already know DNA and, even if some scientists have had trouble accepting it, we know that it is the support of heredity. Studies have also already specified its chemical nature: a combination of nucleotides (phosphate - deoxyribose - nitrogenous base), assembled in long chains.
gases dissolve more in colder water, so in summer the water can become oxygen depleted. Evaporation in summer can reduce water volume; even in summer rainfall climate evaporation rates may exceed precipitation. Evaporation will also cause higher conentrations of solutes of which some may reach toxic levels. Summer sun may also cause algal or cyanobacterial blooms which can further deplete dissolved oxygen and may release toxins into the water.
