T cells become immunocompetent where?
a. yellow bone marrow
b. red bone marrow
c. thymus
d. thyroid
c. thymus
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Which of the following are soluble mediators and activators for T lymphocytes and B cells?
A) IL-2 B) IL-4 C) IL-5 D) IL-2, IL-4, and IL-5
Which of the following statements is true about susceptibility testing or treatment of P. aeruginosa?
a. Susceptibility testing is required to detect intrinsic resistance. b. Repeat susceptibility testing may be needed to monitor development of resis-tance. c. Susceptibility testing of isolates from cys-tic fibrosis patients following standard protocols gives reliable results. d. Treatment with a single antimicrobial agent, such as <-lactam with antipseu-domonal activity, is recommended.
Increasing the resources for one species results in the increase of predator numbers. This reduces the abundance of another prey species. This interaction is
A) indirect commensalism. B) indirect mutualism. C) apparent competition. D) apparent predation.
What evidence would support the hypothesis that larger cells evolved in part by engulfing other, smaller cells?
What will be an ideal response?