When you are carrying a microscope, which of the actions listed below should you do? Check all that apply. Hold the arm with both hands. Put one hand under the base. Put both hands under the base. Hold the arm with your other hand.

Which kind of aquatic ecosystem does the photograph most likely show? a. marsh b. swamp c. lake d. river

What are chlorofluorocarbons made of

What kind of seafood would you expect to have the highest levels of mercury and why? kelp, because they use the sun to photosynthesize on the bottom trophic level. oysters, because they filter feed on plankton on a lower trophic level. small fish, because they eat plankton on a higher trophic level. sharks, because they feed on organisms on a higher trophic level.