The classification of Biological Agents and the use of safety precautions is based on all of the criteria listed except:
a. creation of aerosols during processing and infective dose.
b. availability of treatment.
c. the level of disease or seriousness of the infection.
d. the biological structure of the organism.
D
Although the biological structure is important and may have an impact on all of the other factors listed, the statement of biological structure alone is not significant or specific enough to classify an organism into a specific biosafety category. The other items relate to the potential for exposure and management of that exposure in an infection.
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Typically, flower color and shape are associated with what type of selective pressures?
a. natural selection b. mutation c. sexual selection d. evolution
All cells have:
a. a nucleus, but not necessarily DNA b. a plasma membrane, but not necessarily DNA c. cytoplasm, but not necessarily a plasma membrane d. cytoplasm and a plasma membrane, but not necessarily DNA e. cytoplasm, a plasma membrane, and DNA
How do CAM plants minimize photorespiration?
A. Stomata are only opened at night, storing carbon dioxide in the stromata. During the day the carbon dioxide is released for photosynthesis. B. Stomata are only opened at night, storing carbon dioxide in malate. During the day the carbon dioxide is released for photosynthesis. C. The light reactions and the Calvin cycle occur in different cells, so oxygen does not come into contact with rubisco. D. Stomata are only opened at night, storing oxygen in malate. During the day the oxygen is released for photosynthesis. E. The light reactions and the Calvin cycle occur in different cells, so carbon dioxide does not come into contact with rubisco.
In the process of in vitro fertilization, after a cell has been removed from an embryo for preimplantation genetic diagnosis, the embryo
A. will continue to produce new cells through meiosis. B. will then be placed in a cloning chamber. C. cannot develop into a fetus or baby. D. will continue to grow and develop. E. will be used for gene therapy on parents or siblings.