Which of the following is an example of analytical epidemiology?
A) cross-sectional studies
B) descriptive studies
C) correlation studies
D) observational studies
E) case reports
Answer: D
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It is believed that phototrophy arose approximately 3.3 billion years ago in
A) Bacteria. B) Archaea. C) Eukarya. D) LUCA.
The substantial reduction of the total population of microorganisms on inanimate objects and the destruction of potential pathogens is called ________.
A. disinfection B. antisepsis C. sterilization D. sanitization
Pathogens spread by
a. direct contact. b. indirect contact. c. inhalation. d. contact with a vector. e. all of these
Which ONE of the following is NOT part of the pre-embryo?
A. Maternal Determinants. B. Cords of trophoblastic cells. C. Pronucleus. D. Blastomere. E. Human Chorionic Gonadotropin.