What is biomagnification?
a) increase in biodiversity in a region
b) accumulation of toxins in an environment
c) the enlargement of the territory of specific marine animals
d) the concentration of toxins and contaminants as they move up the food chain
e) the increase in size of a specific habitat
D
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How can viable genetic diversity be restored when a population becomes very small?
A) through hybridization with another species B) through inbreeding C) through sterile breeding techniques D) through asexual reproduction E) through captive breeding programs
What happens to tropical soils when the rainforest is cleared?
a. The soil improves in that soluble nutrients are no longer depleted by the trees. b. There is little effect on the soil because of its depth of richness. c. Clearing interrupts the critical nutrient cycle and leads to soil leaching. d. The soils stabilize and become excellent for grain crops.
The recent (geologically) volcanic activity in Yellowstone National Park is ________
A) related to a transform plate boundary B) related to a divergent plate boundary C) related to intraplate, hot spot volcanism D) related to plate subduction
What is the highest mountain in the Andes?
A) Aconcagua B) Machu Pichu C) Denali D) Altiplano E) none of these