Answer:
So that we can identify them in the same species.
Explanation:
Many animals have similar species but different genus.
The independent variable is that in which the result is dependent on. For experiments, this is usually the item being varied. For this case, what is being varied is that one group is given caffeine while the other is not. That makes the amount of caffeine given to be our independent variable.
Answer:
Chemical properties are tested on not because of their color or their appearance but how they will react to certain tests. Such as; is it flammable? Could it be toxic? Physical properties are tested on and observed because of the texture, the color, smell and etc.
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Answer:
Interspecific competition
Explanation:
This is competition between different species
Intraspecific competition is between the same species
