Which substances form a homogeneous mixture when mixed with water?
salt
vinegar
mud
milk
iron filings
cement

Salt forms a homogeneous mixture when mixed in water

Homogeneous mixture is a mixture which has one phase only

the answer would be 3

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.