| 31. | Some desert animals are diurnal, or primarily active during the day.
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| 32. | Mandrills are mostly diurnal, with activities extending from morning to evening.
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| 33. | It is however not well developed in diurnal forms like many lemurs.
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| 34. | The spin of the Earth is its daily ( diurnal ) rotation.
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| 35. | These monkeys are diurnal and live together in social groups.
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| 36. | The diurnal temperature variation is relatively large, averaging annually.
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| 37. | The diurnal temperature variation is and is lowest during winter.
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| 38. | The diurnal tide cycle ranges only 1 m on average.
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| 39. | The black-headed spider monkey is arboreal and diurnal.
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| 40. | Finally, the latter species is diurnal, not nocturnal.
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