Which best describes the ecosystems on earth?
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a. there are very few types of ecosyste...
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Biology, 22.06.2019 00:30
What was the land like over 500 million years ago? what was under the sea?
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Biology, 22.06.2019 06:30
Match the pollutants. 1. a chlorofluorocarbon smoke 2. a biodegradable organophosphate insecticide freon 3. particle pollution paint 4. hazardous waste monoxide 5. carbon is completely burned malathion 6. carbon is incompletely burned dioxide
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Biology, 22.06.2019 10:30
There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.
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