All eukaryote cells lack a nucleus
Both questions in this item are just similar. The area in the cerebral cortex that is involved in the initiation of the motor impulses are localized in the posterior aspect of the frontal lobe. The answer to this item is the third choice.
Frontal lobe is one of the principal areas of the brain that is involved in the motor functions. The specific cortex for this function is commonly called as the M1 or the primary motor cortex.
Answer:
The process by which a compound increases it's concentration in the tissues of the organisms as it travel up the food chain is called biomagnfication.