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Answer:
Mohs hardness scale is a scale comparing hardness of rocks. There are 10 marker rocks 1-10. They are used to find the relative hardness of the other rocks.
Explanation:
The answer is Vas deferens
Does not have a nucleus. The prokaryotic cell's chromosome float around the cell itself.
I would go with B) Nerves in the finger detect stimuli and send the message to the brain.