A physician is trying to determine if a patient has functioning helper T cells. Which of the following events would provide evidence that helper T cells are acting normally?
A) Antibodies recognize and bind to antigens.
B) Memory cells are produced after the secondary immune response.
C) Antibodies are found in the blood.
D) The inflammatory response is triggered.
Answer: C
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Answer the question using the accompanying figure. The male bee represented by letter A is ____ and the queen bee
represented by letter B is ____.
a. diploid; triploid b. haploid; triploid c. triploid; diploid d. diploid; haploid e. haploid; diploid
Each element on the periodic table is defined by __________________, which is also known as the atomic number.
A. the number of protons B. the number of neutrons C. the number of electrons D. the total number of protons and neutrons E. the mass number
What does water potential refer to?
a. a relative value that is defined in reference to distilled water at atmospheric pressure of 10 MPa b. a relative value that is defined in reference to pure water at atmospheric pressure of 10 MPa c. a relative value that is defined in reference to pure water at atmospheric pressure of 0 MPa d. a relative value that is defined in reference to distilled water at atmospheric pressure of 0 MPa
The boreal forests of North America are dominated by ____.
A. spruce, fir, and pine B. redwoods and sequoia C. birch and aspen D. long-leaf and loblolly pines E. cedars and junipers