'Gradualism' presentation slideshows

The Theory of Gradualism and the Punctuated Equilibrium

The Theory of Gradualism and the Punctuated Equilibrium. Theory by Niles Eldridge and Stephen Jay Gould Presentation by Mark Van Lierde. Gradualism. Gradualism is a universal theory that has been applied to many other sciences aside from biology. Gradualism has been applied to geography

818 views • 18 slides

Chapter 19

Chapter 19. Section 19-2: Patterns and Processes of Evolution. Speciation and Extinction. Fossil record shows that 99% of species that have ever existed have gone extinct

257 views • 13 slides

Co-evolution

Co-evolution. Co-evolution. This is the genetic change in one species in response to a genetic change in another. E.g. the battle between plants and herbivores. A plant may produce chemical defences against insects. The insect then evolves the biochemistry to neutralise these toxins.

514 views • 13 slides

Patterns in Evolution

Patterns in Evolution. Divergent Evolution. Defined: closely related species become increasingly different Cause: Different environments Ex: Red fox (forest) vs. Kit fox (desert). Kaibab Squirrel (Grand Canyon). Convergent Evolution.

242 views • 12 slides

Mechanisms of Evolution

300 views • 11 slides

10.1 Early ideas about Evolution

10.1 Early ideas about Evolution. Evolution. What it is. What it is not. Change in allele frequency of a population over time Descent with modification An explanation of how life changes over time (from the point of origin on).

262 views • 7 slides

Punctuated Equilibrium & Gradualism

Punctuated Equilibrium & Gradualism. Punctuated equilibrium describes the pattern of long stable periods in which species stay the same. These periods are interrupted (or punctuated) by short periods in which the quick pace of evolution rapidly results in the formation of new species.

875 views • 5 slides

Theory of Punctuated Equilibrium

Gradualism. Speciation. Geologic Time. Punctuated Equilibrium. Speciation. Phenotype and Genotype. Theory of Punctuated Equilibrium.

245 views • 1 slides