The O horizon, which is found only in some soil profiles, is an oxygen-rich layer.
Answer the following statement true (T) or false (F)
False
The O horizon is the uppermost soil layer found in some soil profiles. It is exceptionally rich in organic matter because the ground in these conditions is typically saturated with water; oxygen levels within this soil zone are at a minimum.
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The continental shelf contains about 90% of all ______________ ______________
Fill in the blanks with correct word
A solid is not considered fluid because
A. its atoms or molecules are bound as close together as possible. B. its atoms or molecules are under too much pressure. C. of the fixed arrangement of its atoms or molecules. D. of the heavy nature of its atoms or molecules.
The contact between the shale, which dominates the bottom part of this sedimentary sequence, and the sandstone, which dominates the upper part, is best described as
A. blurry. B. sharp. C. gradational.
Which of the following is true of anabolism?
A) It is endothermic. B) It is exothermic. C) It can be either endothermic or exothermic. D) It is neither endothermic nor exothermic.