Which one of the following actions of humans has not contributed to the worldwide reduction in biodiversity?

A) pollution
B) growth of cities
C) logging
D) clear-cutting of rain forests
E) biomass energy sources


E

Biology & Microbiology

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The Ames test ________.

A. is used to measure levels of oxygen-free radicals B. can be used to measure the mutagenicity of chemicals C. is used to measure the repair of thymine dimers D. None of the choices are correct.

Biology & Microbiology

Which element is considered a macronutrient needed by plants?

a. manganese b. iron c. copper d. potassium e. boron

Biology & Microbiology

A local bronchodilation within the alveolus will result in a(n) ________ in the ventilation-perfusion ratio in that region. A vasoconstriction of pulmonary arteriole diameter will result in a(n) ________ in the ventilation-perfusion ratio in that region.

A) lack of change : increase B) increase : increase C) increase : decrease D) decrease : increase E) decrease : decrease

Biology & Microbiology

All of the following are acquired by ingestion EXCEPT

A) botulism. B) cryptococcosis. C) listeriosis. D) poliomyelitis. E) Creutzfeldt-Jakob disease.

Biology & Microbiology