The Environmental Protection Agency uses fish species in the Chesapeake Bay as indicator species, why do you think the EPA would do that?

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

There is a liquid capsule inside a cup full of liquid. the cup full of liquid has salt in it and the liquid capsule has no salt in it. in which direction will the solvent flow? a. the salt does not have to move b. from the capsule to the larger cup c. equally between the capsule and the cup d. from the larger cup to the capsule

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