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Biology

Introduction to The Theory of Evolution by Natural Selection

The Relationship Between Biological Diversity and Evolution

This post will be an introduction to The Theory of Evolution by Natural Selection, looking at the relationship between biological diversity and evolution for Prelim Biology.

Topic: Theory of Evolution by Natural Selection

  • Explain biological diversity in terms of the Theory of Evolution by Natural Selection by examining the changes in and diversification of life since it first appeared on the Earth

 

What is Biodiversity and How Does it Relate to Evolution?

Biodiversity essentially describes the variation of everything living and connected to each other from gene pools to species, communities, ecosystems, etc.

It is built from:

  • Genetic diversity (all the different genes within a species)
  • Species diversity (diversity between species)
  • Ecosystem diversity (variation in ecosystems)

This video goes through biodiversity and its importance.

 

If there is variation in offspring, then the potentiality of them having advantageous traits which will lead to adaptation and then evolution increases. This video will look at how biodiversity and evolution is related.

 

Gene Flow, Speciation and Genetic Drift

Gene flow is the movement of genetic material from one population to another. Speciation is the formation of a new species (a group of organisms that can breed with each other). Genetic drift refers to a random event that results in a population being sorted un-representative of its diversity due to chance. This video will go through gene flow and speciation.

 

This video will go through genetic drift.