To estimate how much the means of a variety of like samples drawn from the same population might vary, what statistic is often used?
A) standard error of the mean B) variance of the mean
C) relative error of the mean D) standard deviation of the mean
Answer: A
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The scientist(s) who discovered that bacteria can transfer genetic information was/were
DNA genetic coding and cell regulation is now understood to be incredibly important to every cell among organisms, and is also associated with viruses. Through the early and mid-1900s, scientists developed new molecular analysis methods that changed the foundations of how we understand "life" to function. Normal health and homeostasis, as well as disease, and natural variations in form and function among organisms are now better understood. Medical and biological applications have increased dramatically with the understanding of DNA molecule structure, and it is helpful to have recognition of the scientists and sequence of events contributing to our understanding. A. Griffith. B. Watson and Crick. C. Chargaff. D. Wilkins and Franklin. E. Hershey and Chase.
Staphlococcus aureus is a bacterium that
causes wound infections. Many strains of S. aureus now exist that have evolved resistance to the potent antibiotic, methicillin. This is an example of ____ selection.
a. directional b. stabilizing c. disruptive d. frequent e. more than one of these types of
The hindwing eyespots of the butterfly Bicyclus anyana responded to artificial selection for increased gold color in both or increased black color in both, but artificial selection could not produce increased gold in one spot and increased black in
the other. This is an example of ________. A) homoplasy B) heterochrony C) genetic linkage D) orthologous genes E) constraint
What would be the likely effect of drinking three alcoholic beverages?
A. Decreased urination due to alcohol activating aldosterone production B. Increased urination due to alcohol inhibiting aldosterone production C. Increased urination due to alcohol inhibiting antidiuretic hormone production D. Decreased urination due to alcohol inhibiting antidiuretic hormone production E. Increased urination due to alcohol activating antidiuretic hormone production