A scientist has noted a possible relationship between a certain chemical substance found in fish and the occurrence of kidney failures in humans. Which of the following preliminary steps should the scientists take before conducting a controlled experiment? a. Establish a cause and effect relationship between the substance and the outcome
b. Write a research grant proposal to the appropriate federal funding agency
c. Review the literature to determine what other research is available on this topic to Distribute a letter of consent to human subjects who will be used in the research.

This patient undergoes a gallbladder sonogram due to epigastric pain. the report indicates that the visualized portions of the liver are normal. no free fluid noted within morisons pouch. the gallbladder is identified and is empty no evidence of wall thickening or surrounding fluid is seen there is no ductal dilation. the common hepatic duct and common bile duct measure 0.4 and 0.8 cm respectively. the common bile ductmeasurement is at the upper limits of normal what cpt code in icd-10 cm code was used

What is the next step in the process after a substrate enters the active site of an enzyme

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.