16. Which of the following substances are elements (check all that apply)? hydrogen
carbon dioxide
calcium
water
air

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 types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs

Does any one know what blood tastes like