Answer:

1.When students move the strips and put them side by side, they can visualize the fractional amounts.

2.similarity is a sameness or alikeness. When you are comparing two things — physical objects, ideas, or experiences — you often look at their similarities and their differences. Difference is the opposite of similarity. Both squares and rectangles have four sides, that is a similarity between them.

3.Gel electrophoresis is a laboratory method used to separate mixtures of DNA, RNA, or proteins according to molecular size. ... This treatment makes the proteins unfold into a linear shape and coats them with a negative charge, which allows them to migrate toward the positive end of the gel and be separated.

Explanation:

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