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on a smaller note, when you are comparing 2 nouns, you should use like and when you are comparing 2 actions or verbs, you should use as.
in question 1, you are comparing the incresed speed, which is an action; so you should us as. Hence, E is the right choice
in question 2, you are comparing pearls and genes, both are nouns. so you need to use like. So, B is the right answer.
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