Four people make observations recorded in the table. which best describes what all of the observations have in common? they involve nuclear energy. they involve radiant energy. the involve changes in waves. they involve changes in energy.

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.

Give examples of selective advantage of organism’s body part/organ

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.