Which of the following does the mumps virus infect?
A) parotid glands
B) reproductive organs
C) pancreas
D) lacrimal glands
E) stomach
Answer: A
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Lichens live on the sides of trees to access sunlight. During this process there is no apparent harm nor benefit to the tree. This is an example of
A. commensalism. B. parasitism. C. herbivory. D. predation. E. mutualism.
Describe the primary types of plant organs, tissues and cells in each of the following: A) maple leaf and B) a potato. How do the organs, tissues and cells reflect the main function of each structure to the plant?
What will be an ideal response?
Which statement about plant hormones is true?
A) Plant hormones are produced in very small concentrations. B) Plant hormones mainly affect reproductive processes. C) A hormone typically has a single, specific effect on all cells. D) Plant hormones play a vital role in photosynthesis.
IL-2, produced by TH cells,
A) activates macrophages. B) stimulates TH cell maturation. C) causes phagocytosis. D) activates antigen-presenting cells. E) activates TC cells to CTLs.