| 31. | Though these population totals sound robust, the murrelets'reproduction rate is only about half what it should be, federal biologists say.
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| 32. | The slow reproduction rate of the Tenkile tree kangaroo may add to the risk factor of the species going extinct.
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| 33. | The slow reproduction rate would also mean that it simply takes longer to replace lost individuals or increase the population.
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| 34. | Because nutrition affects reproduction rates, a drop in nut production can also affect birthrates, lowering the number of new cubs.
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| 35. | But with an exponential reproduction rate and no enemies other than angry humans, the frog population in Hawaii has exploded.
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| 36. | For male mammals, which have a relatively fast reproduction rate, sexual selection leads to adaptations that help them compete for females.
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| 37. | The wandering albatross has no significant natural enemies, and this has enabled it to survive with such a low reproduction rate.
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| 38. | For female mammals, with a relatively slow reproduction rate, sexual selection leads to choosiness, which helps females select higher quality mates.
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| 39. | The normal figure is " net reproduction rate " which is the number of female children a woman will have on average.
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| 40. | If gradual change in the mix of genes and characteristics in a population occurs because of differential reproduction rates, it is evolution.
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