Complete the sentence by selecting the correct answer. Darwin's idea of evolution suggested that… A Evolution does not happen in a straight line, but in many branches.
B Evolution happens in a straight line, with occasional divergents.
C Many organisms evolved from one specimen known as 'Archaea'.
D Variation occurs only in small populations. The variation leads to evolution over time.

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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 !

The hardy-weinberg principle is that genetic frequencies in a population? will remain stable from generation to generation will always be changing will not be affected by environmental changes are always in a 3: 1 ratio