These organisms have mechanisms for keeping their internal concentration of salt stable?

These are organisms that live in the substrate?

These are brown seaweeds that live in cold water?

  English writers compared Native Americans to what other people, claiming that both peoples’ refusal to respect English authority and convert to English Protestantism was barbaric?  

This density zone of the ocean has little change in density with increasing depth, and is 80% of all ocean water?

Explain how a dead zone forms (up to 5 points based on quality of answer)

What acronym stands for the six elements that make up 95% of the body weight of living things?

This is the amount of heat energy required to produce a unit change in the temperature of a material?

This is the greatest source of oil in the marine environment?

Which of these is most dense?