Understanding Evolution: your one-stop source for information on evolution
Resource library Teaching materials Evolution 101 Support this project
print print
The Arthropod Story Table of Contents   

Tools for success: The exoskeleton and the jointed limb

Evolution works with whatever variation happens to exist in a lineage. Lucky for arthropods, they have a lot of raw material to work with. All arthropods inherited characteristics that allowed them to evolve in response to opportunities. Let's look at a couple of very successful groups, trilobites and crustaceans.

The trilobite and crustacean

In this section, we will take a closer look at two groups of arthropods and examine these key questions:
  • How did the exoskeleton contribute to the evolutionary success of trilobites?

  • How did jointed limbs contribute to the evolutionary success of crustaceans?

previous | next  >