Which reason supports the observations of the big bang theory? A.
abundance of helium and deuterium
B.
presence of black holes in the center of galaxies
C.
carbon dating of baryonic matter
D.
observation of radiation from isotopes

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins

If the selected review was submitted in word format, what are the posterior probabilities of it being short, medium, or long? (round your answers to three decimal places.)