| 21. | These butterflies exhibit a polyandrous mating system.
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| 22. | Polygynous trios compared to polyandrous trios showed that having more eggs lowered the group fitness.
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| 23. | Polyandrous females encounter sexual harassment when courted by males resulting to be costly to females.
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| 24. | Marriages tend to be polyandrous, including group marriages and Mannie's own line marriage.
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| 25. | In many polyandrous systems, the males and the female stay together to rear the young.
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| 26. | The females are polyandrous and will help to defend the nests of up to four mates.
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| 27. | Female red flour beetles engage in polyandrous mating behavior in order to increase their fertility assurance.
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| 28. | Polyandrous union occurs in this region when a woman marries the eldest son in a family.
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| 29. | Whether it was polygynous ( patriarchal ) or polyandrous ( matriarchal ) is the big question.
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| 30. | The female is polyandrous, initiating courtship among several males and expelling rival females from her territory.
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