Which scientific field is involved in the identification, classification, and naming of organisms?
A. Phylogeny
B. Epidemiology
C. Taxonomy
D. Pathology
E. Nomenclature
Answer: C
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____ requires both a template and an appropriately placed 3' end to synthesize a nucleic acid
Fill in the blank with the appropriate word.
Which of the following phyla are NOT lophotrochozoans?
A. Platyhelminthes B. Mollusca C. Annelida D. Rotifera E. Nematoda
In order to activate the cell mediated arm of the
adaptive immune response, which of the following must occur?
a. A naïve helper T cell must bind to an antigen-presenting dendritic cell. b. A naïve B cell must be activated in order to activate the effector helper T cell. c. A free bacterium must pass through a lymph node where it will directly activate the effector helper T cell. d. A damaged or infected body cell must pass through a lymph node in order to activate T cells. e. None of these will activate the cell mediate arm.
In aquatic systems, which of the following are the
first organisms to disappear when oxygen levels drop? a. stoneflies and mayflies b. carp and goldfish c. Tubifex worms d. ducks and geese e. none of these