In which PO2 environment would hemoglobin most easily release its O2?
A. 65 mmHg
B. 100 mmHg
C. 75 mmHg
D. 90 mmHg
E. 40 mmHg
Answer: E
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Which of the following statements is true regarding archaeons?
A. Like bacteria, they are killed by peptidoglycan-targeting antibiotics. B. They have cell walls composed of chitin. C. They do not include organisms that can undergo methanogenesis. D. Unlike bacteria, their cell size and cell shape is not determined by diffusion. E. Their transcriptional machinery is similar to the machinery used by eukaryotes.
Which of the following is not a characteristic of nematodes?
A. They have bilateral symmetry. B. They exhibit cephalization. C. They are unsegmented. D. They have a coelom. E. They have a complete digestive tract.
Rotifers obtain their food by the action of
a. tentacles. b. cilia on the wheel organ. c. a muscular pharynx. d. pseudopodia.
Repressible operons are normally turned on in the cell.
Answer the following statement true (T) or false (F)