After darwin proposed his ideas about natural selection as a mechanism for evolution, it took time before evolution was generally considered a theory. why do we now refer to it as a theory? (1 point) fewer scientists agree with darwin's ideas now than they did at first, so it is called a theory. questions still remain concerning its validity, so it must be called a theory. enough supporting evidence has accumulated for it to be called a theory. the meaning of the word 'theory' has changed since darwin's time, and it fits the new meaning.

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 !