You sit next to Uncle Ed, an immunologist, at Thanksgiving dinner. "I'm a 'big eater'," he says, "just like the cells I study." What are the large cells that engulf pathogens that Uncle Ed works with?
A. Monocytes
B. Antibodies
C. Bacteriophages
D. Macrophages
E. Erythrocytes
Answer: D
Biology & Microbiology
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Cell membranes are characterized by the
presence of
a. triglycerides. b. phospholipids. c. unsaturated fats. d. steroids. e. saturated fats.
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Which of the following components of the lung secretes a lubricating substance that allows the lung tissues to separate when inflated?
A. Bronchial tube B. Capillary endothelium C. Basement membranes D. Respiratory membrane E. Alveolar epithelium
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Flowering plants use animals or wind to transfer ________ between flowers.
A. megaspores B. seeds C. pollen D. microspores E. ovules
Biology & Microbiology