What is the term describing an increase in concentration of toxic substances in organisms at increasing trophic levels?
Biomagnifcation
Primary Productivity
Predation
Bioremediation
Biomagnifcation
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Why is gemology considered a separate field from geology or mineralogy?
What will be an ideal response?
The Middle East and Eurasia (primarily Russia) have about 70% of the world's
A. coal reserves. B. natural gas reserves. C. oil reserves. D. peat reserves.
Rivers in the Pacific Northwest are heavily managed by the construction of dams and reservoirs in order to produce hydroelectric power and, in some areas, for irrigation
However, the construction of interior dams can have serious consequences for the coastal erosion of beaches and rocky bluffs along the Pacific Coast. How can the construction of these dams lead to the erosion of a rocky coastal bluff? What will be an ideal response?
Electromagnetic radiation is generated from all of the following except
A) the joining together of protons and neutrons through fusion. B) molecules' electrons and bonds that vibrate. C) changes in the energy level of the electron. D) unconfined waves that radiate out in all directions.