Carbon on Earth is found in both living and nonliving matter. In order for carbon to be continuously available, it must be recycled. The process through which carbon is made available in the atmosphere is through forest fires.
The burning of forest trees and plants is known as combustion.
Combustion can be defined as an exothermic chemical reaction between physical substances, usually in the presence of oxygen and hydrocarbons to produce heat, light and carbon.
This ultimately implies that, the burning of a forest (forest fires) makes carbon available in the atmosphere. It is usually released in the form of either carbon dioxide or carbon monoxide.
Phototropism is one of the many plant tropisms or movements which respond to external stimuli. Growth towards a light source is called positive phototropism, while growth away from light is called negative phototropism (skototropism).
pig feeds only because it supplies amino acids necessary to the animal. But of the total amino acids in the diet, only the digestible amino acids are biologically available to the animal:)
