The primary<span> motor </span>cortex<span> (Brodmann area 4) is a brain region that in humans is located in the dorsal portion of the frontal lobe.</span>
In my science classes, it was called a producer and or a keystone species
Na (sodium), because alkali metals are not found freely in nature due to their high reactivity. (In this group are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr).
