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The primary source of nutrients for plants is found in the ________ horizon.
Q1: Which one of the following are NOT
Q14: Which of the following does NOT commonly
Q23: The type of feature shown in this
Q27: When the climax community appears,<br>A)biodiversity increases.<br>B)the total
Q32: Which of the following is not a
Q38: Which of the following does NOT affect
Q49: When a tropical rain forest is deforested,
Q56: Which of the following most likely indicates
Q73: The main hazard of an eruption that
Q211: If bubbles cannot escape easily from a