Which of the following is not one of the stages of HIV infection?
A. flat or raised lesions on the penis or vulva
B. opportunistic infections
C. a CD4 + T cell count between 200 and 499 per microliter of blood
D. a greater than 500 CD4 + T cells per microliter of blood
E. a CD4 + T cell count below 200 per microliter of blood
Answer: A
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Activation of which of the following is associated with the formation of focal adhesions and stress fibers?
A) Rho B) Ras C) Cdk-42 D) intermediate filaments E) ?-tubulin
Morphological characteristics are widely used for taxonomic classifications because they are ____
a. the most likely indicators of evolutionary relationships b. the most likely to represent reproductive isolation among groups c. easy to assess in living, preserved, or fossilized specimens
d. always the exact phenotypic expression of genotypes e. indicative of genetic relatedness
The number of chylomicrons in lymphatic capillaries of the intestine would be increased by eating _____ .
A. starch B. lactose C. proteins D. triglycerides E. sucrose Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about what chylomicrons contain? What other information is related to the question? Choose Answer · Given what you now know, what information 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?
Which of the following cells are alive at
maturity?
a. sieve tube members b. vessel members c. tracheids d. fibers e. sclerids