What is the name of the network of sugar molecules cross linked by polypeptides that encloses the entire eubacteria? peptidoglycan lipopolyglycan gycosaminoglycan glycosoglycan

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system

How does the nervous system affect the excretory system?

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.