What is possible use for a genetic fingerprint?

What must be true for natural selection to heppen

Monomers are the building blocks of larger molecules, called polymers. for example, proteins are composed of chains of amino acids that are linked together. cellulose is a polymer that makes up plant cell walls. cellulose is made from a chain of c6h10o5 molecules. which monomers are most likely used to produce cellulose? why?

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic