Which of the following is not a common cation that acts as a nutrient for plants?
A. sodium
B. nitrogen
C. magnesium
D. potassium
Answer: B
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Historic sectors of Northern Africn cities, valued for their social fabric, are called _____________.
Fill in the blank(s) with the appropriate word(s).
Activities to limit the production of hazardous waste involve all of the activities EXCEPT:
A. paying a company to haul your waste to a landfill. B. allowing bacteria to break down organic waste in a pond. C. selling waste oil to a company that burns it for heat. D. educating employees about how to correctly label and store hazardous materials and hazardous waste.
Why are most fossils found in sedimentary rock, rather than in igneous or metamorphic rocks? What will be an ideal response?
Which ocean basin is the largest?
A. Pacific B. Arctic C. Indian D. Atlantic E. None of these is correct.