Answer: "the atmosphere" ;
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or, more specifically; the "nitrogen gas from the Earth's atmosphere";
{" N₂ gas in the Earth's atmosphere" } .
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Answer: the contractile vacuole
Explanation: The contractile vacuole is a star-like structure located toward the cell's posterior. This organelle aids the cell in the removal of excess water. Without it, the euglena would be able to absorb so much water through osmosis that the cell would burst.
Hope that helps
Answer:
can be caused by a habitat destruction
happens when a species or population dies out
