| 31. | "It's been cut off from the surface and other biological activity for that time,"
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| 32. | Whether these are slow or rapid changes depends on climate, topography and biological activity.
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| 33. | Coumestrol is a phytoestrogen, mimicking the biological activity of estrogens.
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| 34. | This layer is known as the zone in which the most biological activity occurs.
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| 35. | This leads to uncertainty in the chemical content and biological activity of individual doses.
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| 36. | Alkanes are not very reactive and have little biological activity.
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| 37. | Flavonoids are substances in the plant secondary metabolism with an array of biological activities.
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| 38. | Once returned to Earth, the materials will be examined for signs of biological activity.
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| 39. | Biological activity remained modest and the task force was disbanded after a short while.
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| 40. | We showed the soup contains things that have biological activity.
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