A model can help scientist to study the things that are difficult to understand that can not be observed directly. It allows scientists to examine and visualize that might not be accessible physically. All the natural science is based on the models, these are suggested and tested by observations.
Answer:
A. The tortoises will develop longer necks.
Explanation:
Muscle tension is determined by lots of factors including: (1) muscle force, depending on the amount of force that we exert into our muscles, the muscle tension also varies. (2) angle of pull. This is also a relevant aspect in determining the muscle contraction.
If I'm correct, it would be the microbes.
