Chapter 3 - Chapter 3 Biodiversity Evolution Key Terms 1...

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Chapter 3- Biodiversity & Evolution Key Terms: 1. Biodiversity- Variety of different species (species diversity), genetic variability among individuals within each species (genetic diversity), variety of ecosystems (ecological diversity), and functions such as energy flow and matter cycling needed for the survival of species and biological communities. 2. Biological Evolution- Change in the genetic makeup of a population in successive generations. If continued long enough, it can lead to the formation of new species. [Note that populations, not individuals, evolve. 3. Natural Selection- Process by which a particular beneficial gene ( or set of genes) is reproduced in succeeding generations more than other genes. The result of natural selection is a population that contains great proportion of organisms that are better adapted to certain environmental conditions. 4. Fossils- Skeletons, bones, shells, body parts, leaves, seeds, or impressions of such items that provide recognizable evidence of organisms that lived long ago. 5. Mutations- Random change in DNA molecules making up genes that can alter anatomy, physiology, o r behavior in an off spring. 6. Differential Reproduction- Phenomenon in which individuals with adaptive genetic traits produce more living offspring that do individuals without those traits.
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