Quick Answer. Most wool comes from sheep, although some wool is harvested from goats, muskoxen, rabbits and certain camelid species. Wool produces a unique textile with qualities that cannot be found in fur, such as its crimped texture, elasticity and tendency to grow in clusters for easy harvesting. Continue Reading.
1 This is due to an increase in the number of particles that have the minimum energy required. The reaction rate decreases with a decrease in temperature.  Catalysts can lower the activation energy and increase the reaction rate without being consumed in the reaction.
Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. Many enzymes change shape when substrates bind.