Which of the following is NOT a true statement? O The O horizon is most commonly referred to as topsoil.
O The A horizon is comprised of minerals, decomposed organic matter and large amounts of microorganisms.
O The E horizon is known as a layer of eluviation or loss.
O The Chorizon consists of parent material with little to no alteration due to soil forming processes.

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 !