Should scientists infer evolutionary relationships based on data from a single protein?

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart

Protein and polypeptide sequences can be determined by first partially hydrolyzing the protein or polypeptide followed by amino acid sequencing of the fragment pieces using the chemical degradation process known as edman degradation. determine the sequence of the initial (18-amino acid) polypeptide that produces the following five partial sequences after hydrolysis and edman degradation.