Strongyloides stercoralis
A. can cause a fatal disseminated disease in immunosuppressed patients.
B. rarely causes chronic infection.
C. is ingested with food and does not migrate out of the intestine.
D. is a tapeworm.
E. All of the choices are correct.
Answer: A
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Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?
A) The light reactions provide ATP and NADPH to the Calvin cycle, and the Calvin cycle returns ADP, i, and NADP+ to the light reactions. B) The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle, and the cycle provides water and electrons to the light reactions. C) The light reactions supply the Calvin cycle with CO2 to produce sugars, and the Calvin cycle supplies the light reactions with sugars to produce ATP. D) The light reactions provide the Calvin cycle with oxygen for electron flow, and the Calvin cycle provides the light reactions with water to split. E) There is no relationship between the light reactions and the Calvin cycle.
Which of the following forces contribute to the stability of a DNA double helix?
A. hydrophobic interactions of bases in the same strand B. hydrogen bonding between bases in adjacent strands C. ionic interactions between the positively charged component of one base and the negatively charged component of the neighboring base D. hydrophobic interactions of bases in the same strand and hydrogen bonding between bases in adjacent strands E. hydrophobic interactions of bases in the same strand, hydrogen bonding between bases in adjacent strandsand ionic interactions between the positively charged component of one base and the negatively charged component of the neighboring base
Glucose is absorbed through the membranes of
the small intestine primarily by a. osmosis. b. bulk flow. c. transport proteins. d. endocytosis. e. facilitated diffusion
The epidermis is waterproof and tough due to the activity of ________.
Fill in the blank(s) with the appropriate word(s).