I would say the microscope....................
Its evolution when living things change over time NOT adaptation oops I am sorry for the mistake!!
The function of the respiratory system is to exchange two gases: oxygen and carbon dioxide.
Hope this helps :)
Its used to measure the total amount of available motion at a specific joint
So I guess the answer would be
A. a joints maximum range of motion
Answer: 2,400 kilometers.
Explanation: If an airplane flies at a constant speed of 600 km/h, then it travels 600km in one hour. Therefore, in four hours (600km*4), it will travel 2,400.