I think it’s the first one
In facilitated diffusion.molecules only move with the aid of a protiein in the membrain simple diffusion is passive but facliitaed diffusion is an active process that uses energy simple diffusion requires molecules to move through special doorways in the cell membrane
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.
I am pretty sure the answer is, Archeological records.
