Which of the following masses is the smallest?

0.006 kilograms
500 milligrams
40 grams
4.2 decigrams

The answer is D. 0.42 decigrams is smaller.

Explanation:

I converted everything to grams, 0.006 kilograms = 6 grams, 500 milligrams = 0.50 grams, 40 grams is 40 grams, and 4.2 decigrams = 0.42 grams.

Hope this helps! :)

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.