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Mechanisms of evolution vocabulary

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Mechanisms of evolution vocabulary

  1. 1. • Overproduction:More offspring are produced by an organism than can possibly survive, only the best adapted will survive.(usually) • Competition: High birth rates cause a shortage of life’s necessities, leading to competition between organisms. (food, reproductive rights, habitat) • Variation: Each individual differs from all other members of its species; some differ more than others. (Genetically speaking) • Adaptation: Variations help some organisms to be better suited to their environments than others. These Adaptations usually occur naturally as mutations during reproduction. • Natural selection: The “most fit” (best adapted) organisms survive and reproduce. While unfit organisms die off without reproducing. • Speciation: New species form from ancestral species by means of natural selection.

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