The arguments supporting spontaneous generation were finally disproved by
A) Louis Pasteur.
B) Francesco Redi.
C) Rudolf Virchow.
D) John Needham.
E) Lazzaro Spallanzani.
A
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Generally, heavy metals, except silver, have been proven to be too toxic for use on human tissue and are no longer used medically
Indicate whether this statement is true or false.
The antiviral drugs currently approved for use in HIV disease include ________.
A. protease inhibitors B. nonnucleoside reverse transcriptase inhibitors C. fusion inhibitors D. nucleoside reverse transcriptase inhibitors E. All of the choices are correct.
Cargo ships that entered the Great Lakes through canals in the St. Lawrence River inadvertently introduced zebra mussels. This species is not native to the Great Lakes and reproduces at a very high rate. Zebra mussels are filter feeders and are very efficient at filtering out phytoplankton and zooplankton. How would their introduction impact the organisms on the Great Lakes?
A) Biodiversity would increase because of the introduction of another species to the ecosystem. B) The native organisms would not be impacted at all. C) Their impact would be negligent because the lakes are so big and do not have other organisms that feed on the plankton. D) The native organisms that depended on the same food source would decrease in population, affecting the rest of the organisms in the food web.
Introns
A) are removed by a complex called the spliceosome. B) are sometimes left in the mRNA sequence for alternative splicing. C) are only found in eukaryotes. D) are considered to simply be junk DNA. E) are removed from mRNA in the cytoplasm.