scientists can test differences of the area with pigmentation by observing which is lighter and which is darker however they use microscope to look the difference of the pigmentation over the cells.
A. The different length and different sequence are a good indication they are front different genes and probably have different functions.
Answer:
1. give up 1
2. give up 2
3. give up 3
4. gain 3
5. gain 2
6. gain 1
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Make sure you are eye level with the meniscus of the liquid level, and measure to the bottom of the meniscus.
Answer B sounds reasonable
