What is particularly troublesome about the practice of mountaintop removal for mining coal in the mountains of West Virginia?
A. Dumping of waste rock in the surrounding valleys
B. Land subsidence
C. Cave-ins
D. Gas explosions
Answer: A
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Discuss the development of reptiles from amphibians. What changes were necessary to allow
reptiles to remain on land all the time? Why did this change allow access to many new environments for the reptiles to occupy? What will be an ideal response?
A keystone species
A) has a disproportionately large impact on the stability of an ecosystem. B) typically reduces overall biodiversity of an ecosystem. C) is typically an herbivore. D) is an example of amensalism.
The concentration of carbon dioxide in surface water is low, whereas the concentration of oxygen is high because of the ________.
A. exchange of gases between the atmosphere and the ocean B. conversion of carbon dioxide to bicarbonate C. difference in solubility of the gases D. respiration of plants and animals E. photosynthesis process
What is the process by which hazardous materials travel through body tissues until they reach the bloodstream?
a. Osmosis b. Absorption c. Ingestion d. Permeation