Answer:
B. ATP
Explanation:
The ATP is the type of useful energy that the cells need.
Models show systems that are large, small or complex.They make it easy for study through zooming in an area in a large system.They provide visual presentation of an object or a system that has been created through experimental data.
Explanation:
A model is a representation of an idea, a process or an object in a system used by a scientist to describe a phenomenon that is difficult to be experienced directly.The goal of a model is to ensure that the presentation is done in a logical and objective way.
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Keywords : models, scientific research
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<span>It won't be able to move. What action would occur if both the flexors and extensors contracted simultaneously.</span>