Why are models important ?

Explanation:

Models are important in science because a model is a representation of an idea or an object or systems that could be used to describe something that cannot be experienced directly

Models allow the scientist to describe objects that are too large or too small to be seen normally, things that don't exist anymore, things that have not been created, and events that occur too slowly or too quickly to be seen. Models also communicate ideas that might be difficult to describe otherwise.

Explanation:

edg. 2020

Another way of saying it would be:

Models are important because it allows scientist to help people better understand a subject that they wouldn't be able to understand, due to that fact that other variables prevent the subject from easily being seen and observed. Models also allow you to explain things in a way that is easier and simpler to explain.

answer; i believe that the correct answer is ; males are hemizygous for the x chromosome;

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.