| 21. | This is an example of a copulatory mechanism where the female actively hinders a successful mating.
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| 22. | The bootlace hagfish is a hermaphrodite, and both genders do not have a copulatory organ.
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| 23. | There are two types of slope posture, a pre-copulatory one and an ordinary one.
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| 24. | Prenatal exposure to morphine increases copulatory behavior in male rats while decreases estrous behavior in female rats.
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| 25. | Accordingly, copulatory calls serve more than a single aggressive behavior towards her offspring from other males.
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| 26. | These spines are used during copulation to help overcome female resistance and penetrate into their copulatory duct.
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| 27. | Males and females closer in age are more likely to form pre-copulatory and copulatory pairs.
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| 28. | Males and females closer in age are more likely to form pre-copulatory and copulatory pairs.
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| 29. | Fossa mating includes a copulatory tie, which may be enforced by the male's spiny penis.
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| 30. | Males also have copulatory bursas, used to hold on to the female during copulation and cement glands.
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