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...physically enter the economic system for further processing or direct consumption (they are ‘used’ by the economy). Direct Material Input (DMI) DMI represents materials supply. It measures the direct input of materials for use into the economy, i.e. all materials that are of economic value and are used in production and consumption activities. Total Material...

...physical characteristic of the great majority of omnivores is a non-specialist dentition. What about other aspects of their biology? Question 11 Question: Many omnivores (e.g. bears, pigs) have a good sense of smell. To what extent do you think that this might be another defining characteristic of omnivores? Answer Many carnivores (e.g. brown hyenas) also have an...

...physical properties of air and water and describe implications of such differences for aquatic mammals give examples of the adaptations displayed by aquatic mammals that enable them to hold their breath while submerged for relatively long periods describe some of the biological differences between pinnipeds, sirenians and cetaceans discuss the importance of communication...