What was the major contributor of oxygen to earth's early atmosphere ? A) photosynthesis

B) Organic respiration

C) ozone decomposition

D. Decomposition of ocean water

Explain your answer in your own words

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?