Answer:
in laboratories and offices usually located in university's
Explanation:
Hundreds of years. This process is called succession.
Answer: looks like a ladder
Explanation: just look up the picture
Two vestigial structures is wisdom teeth and the tail bone.
Hope it helps
Although amino acids may have other formulas, those in protein invariably have the general formula RCH(NH2)COOH, where C is carbon, H is hydrogen, N is nitrogen, O is oxygen, and R is a group, varying in composition and structure, called a side chain.