Answer:
Hope this helps :)
Rhizobia are a "group of soil bacteria that infect the roots of legumes to form root nodules". Rhizobia are found in the soil and after infection, produce nodules in the legume where they fix nitrogen gas (N2) from the atmosphere turning it into a more readily useful form of nitrogen.
Explanation:
One type of density change is mass over volume.
That is a codon chart on the right.
You want to put the amino acid sequence correctly. I can’t find it but I know that the t=a. You would change all the t’s to a. Then start from the middle and work your way out following the three letters in the sequence.