Which of the following describes how kidneys remove nitrogenous waste from the blood they filter urea from blood and produce urine, they produce urea and send it to the liver for urine production, they remove protien remains and produce urea, they filter the blood for urine and collect it

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 !