A building has different types of openings, such as windows and doors. Do you think a cell also has different types of openings? Give an explanation for your answer.

b is the correct answer

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answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

answer; talc and gypsum;