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A wide number of answers can be accepted for this questions as long as they mention the following: economic and sociologic values of nature; ethics; our entire dependence on raw materials that come from n...

Natural selection is a theory that became popular after Charles Darwin work and states that traits of living organisms are selected according to their ability to adapt to the environment. It implies that ...

Abiotic: temperature, rainfall, oxygen, nutrient availability Biotic: competition and predation between species, migration

Biofuels are fuels made from organic biomass, i.e., plant material. Sugarcane and sugar beet are sources of biofuels.

Enzymes are involved in chemical digestion. When nutrients are ingested there are many different sized molecules across the various food groups. Some of these molecules are already small enough to be abso...