Biology

The snowball Earth hypothesis provides a possible explanation for the A) diversi

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The existence of evolutionary trends, such as increasing body sizes among horse

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In the 5-7 million years that the hominid lineage has been diverging from its co

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Many species of snakes lay eggs. However, in the forests of northern Minnesota w

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If one organ is an exaptation of another organ, then what must be true of these

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One explanation for the evolution of insect wings suggests that wings began as l

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The existence of the phenomenon of exaptation is most closely associated with wh

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How many of the following statements concerning the loss of hind limbs during wh

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Which of the following characteristics should have been possessed by the first a

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Which of the following factors weaken(s) the hypothesis of abiotic synthesis of

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The legless condition that is observed in several groups of extant reptiles is t

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The various taxonomic levels (namely, genera, classes, etc.) of the hierarchical

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If organisms A, B, and C belong to the same class but to different orders and if

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Linnaeus was a "fixist" who believed that species remained fixed in the form in

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Which of the following is (are) problematic when the goal is to construct phylog

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Which individual would make the worst systematist? One who is uncomfortable with

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If, someday, an archaean cell is discovered whose rRNA sequence is more similar

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The best classification system is that which most closely A) unites organisms th

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Which of the following pairs are the best examples of homologous structures? A)

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The importance of computers and of computer software to modern cladistics is mos

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Which mutation should least require realignment of homologous regions of a gene

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The common ancestors of birds and mammals were very early (stem) reptiles, which

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When using a cladistic approach to systematics, which of the following is consid

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Cladograms (a type of phylogenetic tree) constructed from evidence from molecula

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There is some evidence that reptiles called cynodonts may have had whisker-like

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