Which is a biotic component? -The oxygen concentration of the water
-The temperature of the water
-The plants growing on the sides of a river
-Rocks on the bottom of a river

the answer for apex is "1 and 6"

the correct answer to this question is #5

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.