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Rainbow [258]
3 years ago
13

Replace with new samples of the powders and repeat, this time adding drops of the base. Record observations in the table.

Biology
1 answer:
ycow [4]3 years ago
5 0
What they mean by "base" is the substance. A base is a substance that tastes bitter, has a pH that is greater than 7. It also turns red litmus paper blue. 

In conclusion, what they mean by 'base' is the substance included. 
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<em>Geographical isolation involves the existence of geographical barriers between two populations such that there cannot be mating between the two. The two populations eventually evolve to become different species.</em>

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