The bat and human are two very different species. kevin is trying to explain to his family how similar humans and bats really are. which statement would not be a good argument for common ancestry?
a) they both have hair
b) the forelimbs of both animals have similar anatomy
c) they share similar dna structures of the hemoglobin protein
d) when comparing their embryos at the 1 week stage, they both have a tail and look strikingly similar

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 !