Which of the following best defines the term "transgenic organism"?
A) an organism that is the first of its kind to bear a particular allele
B) an organism in which a genetic defect has been corrected using recombinant DNA therapy
C) an organism containing a gene from another species
D) an organism containing genes from three or more species
C
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Metal-reducing Geobacter and Shewanella species are important in the microbial mining of metals
Indicate whether the statement is true or false.
Most of the aquatic macroinvertebrates in a stream are
(a) clams. (b) insect larvae. (c) worms. (d) arthropods such as crayfish.
Match the microbe with an example of its importance to humans.
A. This group includes beneficial microorganisms that fix nitrogen, make antibiotics, vitamins and enzymes, as well as harmful microorganisms that cause disease such as plague and strep throat. B. Members of this group have caused "mad cow disease" and Creutzfeld Jacob disease. C. Members of this group include decomposers, associate with plant roots and help plants grow, produce antibiotics, help bread rise, and help make wine. D. Members of this microbial group cause serious diseases such as smallpox, AIDS, and Ebola fever. E. Members of this group are photosynthetic, include unicellular and multicellular forms, and are the foundation of aquatic food chains.
Which of the following is used to treat sporotrichosis?
A) penicillin B) sulfonamide C) trifluridine D) oral potassium iodide E) acyclovir