Biology has promoted an understanding of human use of plants and animals. This forms the basis for understanding the effects of organisms and the environment on Products derived from natural resources, especially in the tropics. It also provides an insight as to the length of time or maximum period that any product of Food, Wood, or Leather, in pre or post production state will last without deteriorating or being destroyed or damaged within an environment. This requires the application of the knowledge of insects, microorganisms, plants, fungi and other environmental factors such as...