Which of the following statements concerning adaptive immunity is FALSE?
A) It is always present and instantly protects against infection.
B) It can be stimulated by vaccination.
C) It requires specific recognition of microbes and antigens.
D) It can form memory responses.
Ans: A) It is always present and instantly protects against infection.
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Fill in the blank(s) with the appropriate word(s).
Beta thalassemia is caused by a
a. deletion. b. insertion. c. base-pair substitution. d. frameshift mutation. e. more than one of these
You are a botanist living in the desert. A friend asks you which plant would be most practical to plant in
their yard. What is your answer?
a. Any plant, as long as it is well-watered b. Only C3 plants c. Only C4 plants d. Only CAM plants e. C3 or C4 plants, but not CAM plants
Which of the following immune system cells produce histamine?
A) T cells B) Macrophages C) Mast cells D) Neutrophils E) B cells