But the landers found no other signs of biological activity, nor any organic compounds.

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Also, considerable differences exist in composition, doses and biological activity of the commercial preparations available.

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Its presence in the atmosphere is intriguing and could conceivably indicate biological activity on the planet.

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Soil is, in part, the product of biological activity (all those earthworms, and so on).

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Both landers had mechanical arms, to gather soil samples, and built-in labs to check for biological activity.

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Researchers made all 9, 000 and tested them for biological activity, using automated robots to mix them with various cell types to see their effects.

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And in order to have any biological activity, if the gene fragment is somehow turned into a protein it would have to get into our own cells, and it does not have the capability to do that.

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Widespread procurement activity has been observed abroad and production of biological weapons could be resumed at short notice.

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Boosting the activity of sirtuins in yeast, nematode worms and fruitflies (three rapidly reproducing stalwarts of biological laboratories) does indeed result in longer lifespans.

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