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Evolution
from Science Prof Online
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3. Check out the Featured Evolution Articles below:
- Pre-Darwinian Evolutionary Theory: Larmackianism, Catastrophism & Uniformitarianism
- Charles Darwin & Evolutionary Theory: Natural Selection as Mechanism of Biological Change
- Darwinian Evolution: Theory or Fact? Charles Darwin's Evolutionary Mechanism of Natural Selection
- Evolution & Natural Selection: Genetic Diversity, Relative Fitness and Population Shift
- Natural and Artificial Selection: Biological Change in Wild & Domestic Animals
Spicebush swallowtail larvae have markings that make them look like snake, helping to deter birds and other predators.
1. Genetic diversity:
Members of a population of organisms are not exactly alike, but have some genetic variation that can be passed on to the next generation ... like these beetles.
2. Natural selection:
In a given environment, some traits are better to have than are others. The
organisms in a population with the more favorable triats are better able to survive and reporduce, passing their favorable genes on to the next generation.
3. Time:
Over time, many generations, the population changes as unfavorable traits are selected against, and favorable traits becomemore prevalent in the population.
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What Is Biological Evolution? \e-və-lü-shən\
Evolution is a process that results in heritable changes (genetic changes that can be inherited) in a population, spread over many generations. So, what is requred for evolution to happen?
Page last updated: 2/21/12
