Many clinical microbiology laboratories and public health laboratories use techniques such as microbial staining, microbial growth, enzymatic testing, fermentation testing, and microscopic analysis to identify pathogens in samples. Which categories of classical characteristics for taxonomy are represented here? (Check all that apply.)
A. Biochemical characteristics
B. Molecular characteristics
C. Physiological and metabolic characteristics
D. Morphological characteristics
Answer: D
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The Krebs cycle produces
A. carbon dioxide. B. phosphate. C. acetyl. D. CoA.
Most cells in an adult animal are
a. in G0, or quiescent, phase. b. actively proliferating. c. stem cells. d. undergoing meiosis.
Strategies to develop medications to battle Alzheimer's disease have included:
A) infecting transgenic mice with prions B) removal of the AB42 peptide of the amyloid deposits that it produces C) fostering interaction between AB moelcules to generate fibrillar aggregates D) procedures that encourage the formation of the AB42 peptide E) antibiotics that revent replication of prions
Several species of sea urchins may inhabit the same tide pool and their reproductive periods overlap. Although they practice external fertilization, they seldom interbreed because eggs produce chemicals that are only attractive to sperm of their own species. This is an example of a ________ barrier that ________.
A. prezygotic; prevents gamete fusion B. prezygotic; causes temporal isolation C. prezygotic; causes geographic isolation D. postzygotic; prevents zygote fusion E. postzygotic; causes hybrid infertility