Which of the following is on the same trophic level as a rabbit?
A. deer
B. snake
C. bobcat
D. fox
E. hawk
Answer: A
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Alcohols are not reliably effective at destroying
A. vegetative bacteria. B. enveloped viruses. C. non-enveloped viruses. D. endospores. E. non-enveloped viruses AND endospores.
The nutrient canal is indicated by
a. A. b. B. c. C. d. D. e. E.
In 1986, a nuclear power accident in Chernobyl, USSR (now Ukraine), led to high radiation levels for miles surrounding the plant
The high levels of radiation caused elevated mutation rates in the surviving organisms, and evolutionary biologists have been studying rodent populations in the Chernobyl area ever since. Based on your understanding of evolutionary mechanisms, which of the following most likely occurred in the rodent populations following the accident? A) Mutations caused major changes in rodent physiology over time. B) Mutation led to increased genetic variation. C) Mutation caused genetic drift and decreased fitness. D) Mutation caused the fixation of new alleles.
CO2 and other gases, which absorb the longer wavelengths of infrared light and radiated heat from Earth, are responsible for causing the
A. acid rain. B. ozone layer depletion. C. greenhouse effect. D. decreased biodiversity.