The seed coat develops from the
A) integuments of the ovule.
B) wall of the pollen sac.
C) ovary wall.
D) female gametophyte.
E) endosperm.
A
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There is a strong correlation between stress and susceptibility to colds. What does this mean?
A) Stress must directly cause susceptibility to colds. B) A high susceptibility to colds must directly cause stress. C) People with high stress must come into contact with more cold viruses. D) Stress might or might not affect susceptibility to colds.
Which of the following remain in the blood circulation rather than taking up residence in other tissues?
A. Neutrophils B. Macrophages C. Monocytes D. All of the choices are correct.
Which is true about protein A?
A. It binds to the Fc region of antibody. B. It hides bacteria from phagocytes. C. It enhances binding of phagocytes. D. It digests antibodies. E. It binds to the Fc region of antibody AND it hides bacteria from phagocytes
Whenever the body is exposed to an allergen, the IgE
antibodies cause a. the production of prostaglandins and histamine. b. the release of antihistamines. c. the suppression of the inflammatory response. d. the production of clonal cells. e. all of these.