![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Smuts, Barbara, 272, 275, 277, 335, 346-47, 348
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Snell, Peter, 296
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Sociobiology, 325
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Song of Songs, 301
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | "So You're Going to Have a New Body!" (Schwartz), 121
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Sperm cells, 2, 7
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | alkalinity of, 55
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | bisexuality of, 19
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | production of, 15-16
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Spiral arteries, 100, 101, 106-7, 108
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Spotted hyena (Crocuta crocuta) , 63, 252-54
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | SRY (sex-determining region) on Y chromosome, 30-31, 40
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Staphylococcus aureus , 104
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