If a compost pile is turned frequently and other conditions are adequate for aerobic digestion, the composting can be completed in
A. 1 day.
B. 1 month.
C. six weeks.
D. six months.
C. six weeks.
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How can one increase the rate of a chemical reaction?
A. Increase the activation energy needed. B. Cool the reactants. C. Decrease the concentration of the reactants. D. Add a catalyst. E. Increase the entropy of the reactants.
Several cases of an emerging infectious disease are reported in workers at a research station that borders a tropical rainforest region. The pathogen is identified as a species of bacteria carried by nematodes that infect mosquitos, and disease transmission occurs in a human host following a mosquito bite. Which organisms should be targeted in the treatment of infected patients?
A. Nematode and bacteria B. Mosquito, nematode, and bacteria C. Mosquito and nematode D. Mosquito and bacteria
The immune system consists of ____
a. physical barriers only b. innate immunity only c. adaptive immunity only d. innate and adaptive immunity only e. physical barriers, innate immunity, and adaptive immunity
Some members of the spirochetes move by means of
A. gliding. B. hami. C. peritrichous flagella. D. axial filaments. E. nothing, they are non-motile.