If a population of lemmings grows fast during a productive winter and shoots beyond the carrying capacity the population will ________
A) quickly crash back below the carrying capacity
B) continue to grow just as quickly
C) revert to logistic growth
D) continue to grow but in an S shape
E) slowly return to below the carrying capacity
A
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After the explosion of the Deepwater Horizon oil-drilling platform in 2010, Scientists estimate that about ________ of the oil evaporated or dissolved into scattered molecules
A) 10% B) 25% C) 40% D) 75% E) 90%
In the Proterozoic Eon, the atmosphere began to accumulate significant oxygen. This is called ___.
a. the life explosion b. the global oxygen c. the transition event d. the great oxygenation event
Humans have dramatically altered the rate of nitrogen fixation into forms usable by autotrophs ________
A) by producing synthetic fertilizers and applying them to crops, lawns, and parks B) due to the burning of fossil fuels to meet our energy needs C) because of the erosion of farmlands through poor agricultural practices D) by using antibiotics to reduce the numbers of denitrifying bacteria E) by selectively removing leguminous plants
Metals such as arsenic can quickly move through ecosystems because they ________
A) quickly become incorporated into sugars and starch B) easily clump together and bind tightly to soil compounds C) are soluble in water and are readily absorbed D) quickly dissolve in the fats of animals