19th-century naturalists tried to reconcile traditional beliefs with physical evidence of ____________________. Fill in the blank(s) with the appropriate word(s)
ANSWER: evolution
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The Northern leopard frog (Rana pipiens) and Southern leopard frog (Rana utricularia) are morphologically similar, but they do not mate. They sound very different when calling for a mate. Which mechanism may explain why these frogs are listed as separate species?
A. the inability to interbreed because of morphological differences. B. the difference in bone structure and skin color of the organisms. C. DNA sequences of particular genes. D. the habitat of the organisms. E. both the DNA sequences of particular genes and the inability to produce viable offspring.
All environments have both ____ and ____ components
a. hydrospheric; lithospheric b. lithospheric; atmospheric c. ecologic; atmospheric d. biotic; abiotic e. organismal; ecologic
Animal models such as the ____________________ and ____________________ are being studied to identify single
genes that control aspects of learning, memory, and spatial perceptionFill in the blank(s) with the appropriate word(s).
A surge in the level of LH indicates that ________ is about to occur
A) ovulation B) puberty C) the testosterone peak D) the progesterone peak E) menstruation