Theories of Evolution

• The Theory of Need which states that organisms change in response to their environment.
• Jean Baptiste de Lamarck was the first evolutionist to believe that organisms change over time.
• Charles Darwin’s theory of evolution states that evolution happens by natural selection.
• The artificial selection also called "selective breeding”, is where humans select for desirable traits in agricultural products or animals, rather than leaving the species to evolve and change gradually without human interference, like in natural selection.
• Mimicry: A phenomenon in which an individual gains some sort of survival advantage by looking like an individual of another (often more harmful) species.
• Camouflage: A Structural adaptation that enables an individual to blend with its surroundings, and that allows an individual to avoid detection by predators.
• Mollusk: A member of the phylum Mollusca; also spelled mollusk (most especially in the United Kingdom).
• Epibiont: An organism that lives on the surface of another living organism. can settle and grow to cover and camouflage the shell.
• Diversity: The variety of species in a sample, community, or area. of life is the result of 3.8 billion years of natural selection favoring advantageous variations, some of which ultimately lead to new species. Genetic drift
• Speciation: The process in which one species evolves into a different species (anagenesis) or in which one species diverges to become two or more species (cladogenesis); see also allopatric speciation, parapatric speciation, peripatric speciation, sympatric speciation.
• Genetic Drift: Change in the gene pool that occurs when the frequency of an allele changes over generations due to random chance.