The rate of extinction picks up dramatically during a(n) __________, when a large proportion of Earth’s organisms
become extinct in a relatively short period of geologic time. What will be an ideal response?
ANSWER: mass extinction
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The release of testosterone requires
a. GnRH. b. luteinizing hormone. c. Sertoli cells. d. GnRH and luteinizing hormone. e. GnRH, luteinizing hormone, and Sertoli cells.
For a cell to take up sugar from the bloodstream,
a. sugars must bind to receptors on cells of the pancreas. b. a person must have had a meal with sugar within the last twenty-four hours. c. homeostatic mechanisms must activate the blood-brain barrier. d. glycogen must be broken down to provide a supply of glucose. e. the pancreas must supply the appropriate enzymes to make sugar available.
All of the following are TRUE regarding the effect of smoking on the respiratory system EXCEPT which one?
A) The production of mucus increases in response to the presence of smoke. B) Smoking destroys cilia lining the respiratory tract. C) Particles and debris from the smoke accumulate in the mucus of the airway and increase the risk for infections by pathogens. D) Antimicrobial compounds found in the respiratory mucus of smokers decrease the likelihood of infection. E) "Smoker's cough" results from the heavy coughing that is necessary to clear accumulated mucus or particles from the airway.
The subjective evidence of disease sensed by the patient is termed
A. inflammation. B. pathology. C. syndrome. D. symptom. E. sign.