True
DNA are cells that carry genetic codes and are passed down through generations of offspring. New cells can only arise from existing cells!
Autotrophs <span>produce their food by absorbing the sun's radiation</span>
The nitrogen in the air cannot be used by producers and consumers. It must be fixed or converted by bacteria in the ground into a useable form for plants called nitrates. Some plants called legumes (beans and clover) actually have bacteria in their roots.
<span>An event in which rain-cooled air hits the ground and spreads out in all directions is called a </span>downburst.
