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I received a "challenge" from a member of this forum a while back to explain punctuated equilibrium in terms a kindergardener would understand. Here I go...
Gradualism states that evolution occurs uniformly throughout lineages. In this view, evolution is viewed as usually smooth and continuous. You could view gradualism as an important factor in species evolution within a "stable" evironment (insect eater evolving into a seed eater).
"Punctuated equilibrium" states that species generally remain stable throughout most of their earth history, and that when physical evolution does occur, it is localized in rare, rapid events of branching speciation.
Now remember that "rapid" in terms of Earth time is anywhere from a few 100,000 to a few million years. That is a long time, isn't it? Punctuated equlibrium is most likely brought about by major events such as climate change, changes in geography (formation of mountains, etc.) and other environmental factors.
Most likely both gradualism and punctuated equilibrium are important parts of evolution.
How did I do?
Gradualism states that evolution occurs uniformly throughout lineages. In this view, evolution is viewed as usually smooth and continuous. You could view gradualism as an important factor in species evolution within a "stable" evironment (insect eater evolving into a seed eater).

"Punctuated equilibrium" states that species generally remain stable throughout most of their earth history, and that when physical evolution does occur, it is localized in rare, rapid events of branching speciation.

Now remember that "rapid" in terms of Earth time is anywhere from a few 100,000 to a few million years. That is a long time, isn't it? Punctuated equlibrium is most likely brought about by major events such as climate change, changes in geography (formation of mountains, etc.) and other environmental factors.
Most likely both gradualism and punctuated equilibrium are important parts of evolution.
How did I do?
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