All neurons can produce chemical impulses and have within them an axon hillock that decides if the impulse will be produced or not. Learn how this dynamic processing center uses incoming signals from other neurons to make its decision.
The land form that would be best for farming would depend on what you're farming. The best type of land for farming crops would be flatland - or plains. In the south the area used for farming is the Piedmont area, the area between the hills and the coastal plains. The land form that would be best for farming would depend on what you're farming.
Pick which grass is best for your climate. Depending on where you live you will have better luck with some grass varieties than others. Grasses fall into two basic categories: warm-season and cool-season. Warm-season grasses will be able to survive a brutal summer and tend to do well in the southern states.