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Q35: Two species of frog mate in the
Q44: Imagine that a scientist discovers a new,
Q54: You observe two groups of freshwater fish
Q85: Carbon is incorporated into the skeletons of
Q105: Examine Figure 22.10, below. Which of the
Q108: Intrasexual selection typically includes physical competition among
Q122: When two populations have undergone divergence in
Q130: The discovery of Tiktaalik roseae was significant
Q157: A small group of cells at the
Q172: Many valuable horticultural varieties of plants, including