Cytokines can:
a) Stimulate inflammation
b) Stimulate antibody production
c) Be secreted by one cell to affect another
d) All of the above are correct
Answer: d) All of the above are correct
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About how many cells per day divide in a
healthy adult human?
a. thousands of cells b. millions of cells c. billions of cells d. trillions of cells e. quadrillions of cells
Which technique can be used to identify Down syndrome in a developing fetus?
A) PCR B) Southern blot C) Chorionic villus sampling D) Gel electrophoresis E) RFLP
The empirical formula for the structural formula below is
A. COH.
B. C4HO2.
C. CH2O.
D. CHO2.
Which statement is not an example of evolution that has resulted from human activity?
A) Many strains of bacteria are now resistant to some commonly used antibiotics. B) Like certain other crops, domesticated strawberries are larger than wild strawberries. C) Because of hunting, organisms such as bears and wolves are fewer in number. D) Some insect species are now resistant to pesticides.