Which of the following rocks forms from shells and calcium carbonate?

-limestone
-halite
-mudstone
-coal

The transport tubes from food came down the plant are called?

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes