Based on the cell theory, which of the following is true? large organisms have fewer cells than small organisms. small organisms have smaller cells than large organisms. all living things are made of more than one cell. cells vary in size depending on their type.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.