How do feedback loops regulate the action of hormones?

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?

Several billion years ago which gas was the least prevailant in the atmosphere

Why is it to call the calvin cycle the light independent reactions vs the dark reactions