A widely used nontreponemal serologic assay is the ________ test
a. rapid plasma reagin (RPR)
b. Treponema pallidum passive particle ag-glutination (TP-PA)
c. fluorescent treponemal antibody absorp-tion test (FTA-ABS)
d. microhemagglutination test for antibody to T. pallidum (MHA-TP)
A
The two most widely used nontreponemal serologic assays are the RPR test and the Venereal Disease Research Laboratory (VDRL) test. Each of these tests is a flocculation (or agglutination) test, in which soluble antigen particles are coalesced to form larger particles that are visible as clumps when they are aggregated by antibody.
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If you crossed flies heterozygous for the Cy allele, what phenotypes would you find in the adult F1 generation?
Let Cy = curly wings and Cy+ = wild type. In Drosophila, the Cy allele behaves as a dominant mutation that produces curly wings in the heterozygous condition (Cy/Cy+), but also behaves as a recessive lethal mutation. Flies homozygous for the Cy allele die before reaching adulthood. A. both wild type and curly wings B. wild type only C. curly wings only D. None because all the F1 flies would die before reaching adulthood. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about dominant and recessive alleles? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Prokaryotes reproduce rapidly and this allows genetic variation to spread quickly through a population. Two processes can create new variations in prokaryotic populations. Select the choice with those two processes.
A. mutation and phage viral attack B. phage viral attack and genetic recombination C. genetic recombination and nondisjunction D. genetic recombination and mutation E. genetic recombination and rapid cell division
Consider the aquatic insects pictured in the accompanying figure. Which characteristic of water molecules directly
contributes to their remarkable "water walking" success?
a. ionic bonds
b. capillary action
c. hydrogen bonds
d. adhesive forces
e. nonpolar covalent bonds
Why is it the case that an instrumental variable is not found directly in the determining function?
A. If an instrument is exogenous, then it has an effect on the outcome just not a statistically significant one. B. If an instrument is relevant, then it has an effect on the outcome just not a statistically significant one. C. If an instrument is exogenous, then it has no effect on the outcome beyond those already in the determining function. D. If an instrument is relevant, then it has no effect on the outcome beyond those already in the determining function.