HELPLPP ME pls

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

18. how do the cells in meiosis differ from the cells in mitosis?

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.