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a graphical representation of the evolutionary relationship between taxonomic groups based on certain characteristics.
pollutant gases such as nitrogen monoxide and nitrogen dioxide. They are produced during ...
all types of waste that pose a significant threat to people and the environment.
an infectious disease that is widespread in tropical and subtropical parts of the world and is...
(also called autotrophic organisms) organisms that produce their own organic food, mainly...
secretory tissue in the leaves of plants that secretes water through pores in the epidermis or...