Answer:
the living together in more or less intimate association or close union of two dissimilar organisms (as in parasitism or commensalism) especially : mutualism.
Explanation:
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Empty space. We now know that this is the gap between the electrons and nucleus.
Answer:
The heating and melting of candle wax
Explanation:
It heats up, but when cooled it hardens and cannot be put back into its original form.
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Answer:
In displacement reactions
Explanation:
