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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...

Gene cloning refers to a process in which a gene of interest is ligated to a vector. The recombinant DNA thus produced is introduced in a host cell by transformation. Each cell gets one DNA molecule and w...