Which of the following is NOT an effect of global
warming?
a. an increase in global photosynthesis
b an increase in atmospheric CO2 levels
c. a probable increase in extinction of species
d. changes in temperature and precipitation
patterns
e. changes in plant and animal life cycles
Answer: a
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The number of Vibrio cholera cells necessary to produce cholera in an exposed individual is drastically reduced if the individual is malnourished
Indicate whether the statement is true or false.
During muscular contraction, cross-bridges form between _____ and _____ .
A. actin, myosin B. actin, tropomyosin C. myosin, troponin D. myosin, tropomyosin E. troponin, calmodulin
Messenger RNA is single-stranded
Indicate whether the statement is true or false
The secondary stage of syphilis
A. occurs within 10 days of the primary stage. B. is when the patient is no longer infectious to others. C. has no symptoms. D. is a time when the pathogen enters and multiplies in the blood. E. is when gummas develop in tissues.