[an error occurred while processing this directive] [an error occurred while processing this directive]




   
Feature
From Fins to Wings
NOVEMBER 2006
Feature Main Page
Photo Gallery
On Assignment
Learn More
Forum
Photo caption by Jennifer Holland
[an error occurred while processing this directive]


From Fins to Wings Gallery Photo

Limulus polyphemus, photographed at Marine Biological Laboratory, Woods Hole


Previous Image 10 of 21 Next Image
Horseshoe Crab
Photograph by Rosamond Purcell

A horseshoe crab is a Swiss army knife of jointed limbs—for walking, swimming, grasping, shredding, and defending. Yet the same ancient cluster of Hox genes governs the development of body segments in all arthropods. What type of limbs a segment acquires depends on which Hox gene is in control there, and on how evolution has reshaped the original unadorned parts to suit new needs.

E-Mail this Page to a Friend