Which of the following describes a medical drug

(6.02 mc)what affect do marine protected areas have on environmental quality? they increase environmental quality by preventing resource overuse. they increase environmental quality by adding new species. they decrease environmental quality by removing all human activity. they decrease environmental quality by adding recycling facilities.

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above

Which soil would most likely be found in the arctic? andisols gelisols histosols spodosols