Select the correct answer. What term describes a new community replacing an existing community?
O A.
primary succession
OB.
climax community
O c. secondary succession
OD.
seasonal succession
OE.
ecological replacement
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How energy move through ecosystem ?

For which of the following ions is the intracellular concentration typically higher than the extracellular concentration? a. sodium b. calcium c. magnesium d. potassium e. chloride

Which technology do environmental scientists use to track the movements or polar bears and other vulnerable populations? a) geographic information system(gis) b)environmental dna(edna) surveillance c) global positioning system(gps) d) unmanned aerial system (uas)