Examlex
NASA scientist Jim Hansen has recommended that we bring our atmospheric carbon dioxide levels down to _____ from the current level of _____ in order to maintain a planet with fairly constant atmospheric temperatures.
Evolution
A method through which various types of organisms are believed to have evolved and varied from their ancestors throughout Earth's history.
Natural Selection
A mechanism of evolution where organisms better adapted to their environment tend to survive and reproduce more offspring.
Adopted Children
Individuals who have been legally taken into a family different from their birth family, becoming full members of the adoptive family with all the rights and responsibilities that entails.
Biological Parents
The individuals from whom a person inherits their genetic characteristics, typically referred to as the natural mother and father.
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