Which of the following can cause a decrease in dissolved oxygen in the water ? a. a small population of fish
b. a large number of plants
c. excessive plant debris
d. lack of animal life

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.

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

We can be sure that a mole of table sugar and a mole of vitamin c are equal in their 1) mass in daltons. 2) mass in grams. 3) number of molecules. 4) number of atoms. 5) volume.