Coli has a positive nitrate test (ability to reduce nitrate). this would indicate that the organism can carry out respiration.

anaerobic respiration

Explanation:

Anaerobic respiration is simply respiration in the ABSENCE OF OXYGEN.

A positive nitrate test mean Escherichia coli reduces NO3 (Nitrate) to NO2 (Nitrite). This is based on its ability to produce nitrate reductase enzyme that catalyze the reduction process. And note that this reaction occurs in the ABSENCE OF OXYGEN.

This makes E. coli an ANAEROBE ( an organism that can survive in the absence of oxygen)

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.