An experiment was designed to test the effect of a new vitamin supplement on treating the common cold. Two groups of 100 patients were formed. Both groups had colds caused by the same virus. Group A was given the new supplement and observed for
48 hours. Group B was given the standard vitamin C supplement and observed for 48 hours. At the end of this time period,
researchers measured symptoms using a medical checklist.

Ineed to know why d is the correct answer asap

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.

Scientists are conducting a study on the effectiveness of a new drug on memory loss. they are giving some of the test subjects the new drug to find out if it improves their long-term memory. which are possible limitations of this study? check all that apply. a) test subjects may want to participate in additional experiments. b) test subjects may think they should be paid more. c) test subjects may get bored and want to quit early. d) test subjects may have to travel during the experiment. e) test subjects may have full-time jobs. this is multiple choice. you for the !