What are the two primary criteria for identifying "good" controls?
A. They are likely correlated with treatment and they influence the outcome.
B. They are likely correlated with the treatment and do not influence the outcome.
C. They are likely correlated with the treatment and they do not influence the outcome per se.
D. They are likely uncorrelated with the treatment and they influence the outcome.
Answer: A
You might also like to view...
Primary productivity in forests often increases during the early stages of stand development and then decreases again as the forest ages and standing biomass increases
Indicate whether the statement is true or false
Which piece of evidence would allow you to reject the hypothesis of separate types?
A) fossil evidence showing that organisms have been on Earth for billions of years B) similarity of physical structures among species C) universality of DNA to all life D) fossil evidence that species have changed over time
A virulence factor is one which
A) allows a microbe to invade and establish itself on the host. B) allows a host to evade infection. C) normal flora use against invading microorganisms. D) invading organisms use against normal flora.
Choose the TRUE statement(s) about a drug that blocks the ability of vasopressin to bind to its receptors on the collecting duct. (Select all that apply.)
a. There will be more aquaporin molecules on the apical membrane of the collecting duct. b. Urinary water output will increase. c. More water will be reabsorbed across the collecting duct. d. This drug could be very dangerous for a person deprived of water in the desert.