Biomagnification can directly cause
A) increases in the amount of energy to be available in the ecosystem.
B) rapid population explosions when environmental conditions provide an opportunity for growth.
C) a temporary speedup of nutrient cycling in an ecosystem.
D) higher-level heterotrophs to be more susceptible to poison than lower-level heterotrophs.
D) higher-level heterotrophs to be more susceptible to poison than lower-level heterotrophs.
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The structure of an ice crystal is mostly determined by the ________ and ________ profiles in the atmosphere
Fill in the blank(s) with the appropriate word(s).
Which of the following is an important biological reaction of thiols?
A) the combination of two thiols and the elimination of H2S to yield a thioether B) the reduction of two thiols to form a disulfide C) the oxidation of two thiols to form a disulfide D) none of the above
Predation influences evolution when
A. Predators kill off all of their prey B. A population of predators develop defensive characteristics C. An individual predator adapts and becomes more efficient in catching its prey D. Prey species change their reproductive rate to match predation in the local ecosystem E. Prey species develop defensive characteristics over generations
What kind of economy does the U.S. have?
A. high-consumption, high-waste B. low-consumption, low-waste C. high-consumption, zero waste D. no consumption, recycle and reuse