I believe it’s the first, third and fourth ones. I might be wrong and I’m sorry if I am.
Answer: Portrayal of thermal convection as a mechanism.
if its not right im srry :(
but if it is your welcome :D
<span>s that a single on off switch can control the whole cluster of functionally related genes; these genes are coordinately controlled (ex: when Ecoli must make tryptophan for itself because the nutrient medium lacks this amino acid all the enzymes for the metabolic pathway are synthesized at one time)</span>
