| 21. | Johan specialises in invertebrates, particularly tardigrades.
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| 22. | Tardigrades are microscopic invertebrates that live among mosses and lichens, and in lakes and oceans.
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| 23. | It has been observed in tardigrades.
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| 24. | As they call down to warn Sadie, she realizes she is standing amid the tardigrades.
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| 25. | He focused on the tardigrade, a tiny water animal famous for its virtually indestructible elliptical form.
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| 26. | Some extremophile microrganisms, such as tardigrades, can survive vacuum for a period of days or weeks.
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| 27. | The anatomy of the reproductive system is an important defining feature in distinguishing the different groups of tardigrades.
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| 28. | In this case the tardigrades were actually exposed to the ultra high altitude of the Space Shuttle orbit.
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| 29. | Tardigrades are prevalent in mosses and lichens and feed on plant cells, algae, and small invertebrates.
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| 30. | Tardigrades, in the case of " Echiniscoides wyethi ", may be found on barnacles.
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