What type of symbiotic relationship is exemplified by athlete's foot?
A. Commensalism
B. Atavism
C. Mutualism
D. Parasitism
Answer: D
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Mycetoma is a subcutaneous infection that involves the lower extremities but may also occur in any part of the body. Swelling, purplish discoloration, and tumorlike deformities of the subcuta-neous tissue are all symptoms associated with mycetoma. Which organism can cause this disease?
a. Bipolaris spp. b. Exserohilum spp. c. Pseudallescheria boydii d. Exophiala dermatitidis
A genus in the family Enterobacteriaceae that is a major pathogen of crop plants is ________.
A. Erwinia B. Shigella C. Yersinia D. Proteus
What specific type of P-type ATPase pumps H+ to acidify the stomach and is inhibited by proton pump inhibitor drugs used to treat excess stomach acid?
A) type 1 B) type 2 C) type 3 D) type 4 E) type 5
Which of the following is a multicellular mass that nourishes the embryo until it becomes a self-supporting seedling?
A) the endosperm B) a seed coat C) a fruit D) a cotyledon