Examlex
Buffer strips are usually a last-resort mechanism of pollution control because of their expense and unfavorable side-effects.
DNA
Deoxyribonucleic acid, the molecule carrying genetic instructions for the development, functioning, growth, and reproduction of all known living organisms and many viruses.
Physical Change
A type of change in which the form of matter is altered but one substance is not transformed into another, maintaining the material's chemical properties.
Carbon Dioxide
A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in the air and absorbed by plants in photosynthesis.
Iron
A metallic element (Fe) that is vital for biological processes in humans and other organisms, such as oxygen transport and cellular metabolism.
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