If one is testing a goodness of fit to a 9:3:3:1 ratio, how many degrees of freedom would be associated with the Chi-square analysis?
What will be an ideal response?
number of classes minus 1 = 3
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Indicate the cell types that are most likely involved in tissue rejection.
A. Cytotoxic T cells B. Macrophages C. T helper cells D. B cells E. Neutrophils
Meiosis in female humans is completed
a. before birth. b. shortly after birth. c. during the ovarian cycle. d. at fertilization. e. when a woman is fully mature
Explain how mitochondrial DNA studies of Africans and Europeans support the replacement model for the evolution of modern humans.
What will be an ideal response?
When NADH or NADPH transfers electrons to a recipient molecule, the recipient becomes reduced and the activated carries are oxidized (NAD+ or NADP+, respectively). What else happens during this reaction?
A.) a phosphate group is transferred to the recipient molecule B.) a proton is take up by the carrier C.) a proton is released into the solution D.) a proton is taken up by the recipient molecule E.) a molecule of water is released into the solution