Why wrestlers ear is deformed or broken? #shorts #youtubeshorts

Why are the ears called mechanoreceptors ?

Why does the ear has a pinna ?

In activity 1, why does the portion of the pencil inside the water appears to be thicker and broken near the surf ace of water?

If night period is broken by a single flash of red light, followed by far red, red and finally far red light, what will be its effect on flowering in short day plants