Ascientist uses a special instrument to measure the depth of earth’s crust. he measures one location that is 65 kilometers deep. where is this section of crust most likely located?

below a vast ocean
below a deep canyon
below a mountain range
below an island volcano

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?

How can you tell the difference between rough er from smooth er?