1. speed up chemical reactions
2. are not destroyed but re-used
3. are substrate specific
4. genes determine how many enzymes you have
5. decrease the activation energy needed to start a chemical reaction
6. are protein catalysts
I wont to say Cherokee not 100 percent sure
Explanation:
The use of livestock and its sub product manure are important in crop production. Livestock is a source of energy providing draught animal power while manure improves soil structure and fertility as well as water retention. Both uses are environmentally friendly improving energy and nutrient cycling.