Transgenic plants produced by biotechnology contain fewer introduced genes than altered plants
obtained by traditional breeding methods. Indicate whether the statement is true or false.
T
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Arrange the steps of antibody-mediated immunity in the proper order
1. Plasma cells secrete antibodies. 2. Helper T cells interact with B cells displaying the same antigen-MHC complex. 3. Contact with antigen. 4. Clones of B cells produced. 5. Fragmentation of antigen.
a. 3, 2, 5, 1, 4 b. 3, 5, 2, 4, 1 c. 1, 3, 5, 2, 4 d. 4, 3, 2, 1, 5 e. 5, 3, 4, 2, 1
The metabolic rate of an endotherm _____ at low environmental temperatures while the metabolic rate
of an ectotherm _____ at low environmental temperatures
a. falls; rises b. falls; falls c. rises; falls d. rises; rises e. it depends on the particular endotherm or ectotherm, so all of these are possible
Inflammation begins when mast cells in tissue release __________, which increases blood flow and
also makes capillaries leaky to phagocytes and plasma proteins. Fill in the blank(s) with the appropriate word(s).
Which of the following is not an aminoglycoside?
A. Tobramycin B. Amikacin C. Tetracycline D. Streptomycin E. Gentamicin