Which vitamin, taken in amounts higher than the recommended upper limit, can have positive effects on blood lipid levels?
a. biotin
b. thiamin
c. vitamin D
d. niacin
Ans: c. vitamin D
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Which of the following statements best describes the function of hair?
A. insulation B. sensory perception C. camouflage D. protection and defense E. All the choices provided are correct
Which of the following is a mechanism by which new susceptible individuals enter a population?
A. Birth of new individuals B. Migration of individuals into the population C. Birth of new individuals and migration of individuals into the population D. Enhancement of immune systems through immunization
DNA replication occurs
a. between the gap phases of interphase. b. immediately before prophase of mitosis. c. during prophase of mitosis. d. during prophase of meiosis. e. at any time during cell division.
The menstrual cycle actually consists of two cycles that are interconnected: the ovarian cycle and the uterine cycle
Indicate whether the statement is true or false