On Figure 37-3, the part of the embryo that contains most of the food used by the embryonic plant during germination is labeled:
a. 2.
b. 3.
c. 4.
d. 5.
e. 6.
C
Biology & Microbiology
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Macrophages and dendritic cells are
A. T cells. B. B cells. C. antigen-presenting cells. D. antibody-producing cells.
Biology & Microbiology
Which of the following molecules does not act as a second messenger?
a. protein kinase b. IP3 c. DAG d. calcium ions e. cyclic AMP
Biology & Microbiology
Generally speaking, vaccinations are effective in combating future infections because they induce the production of
A. mutations in the host genome. B. prostaglandins. C. helper T cells. D. neutrophils. E. memory cells.
Biology & Microbiology
Which of the following viruses maintains a latent state in nerve cells?
A. herpes virus. B. hepatitis A virus. C. Norwalk virus. D. rotavirus.
Biology & Microbiology