Social evolution: honey bee nurse workers rear larvae as either new queens or new workers
Pupa of the butterfly Porphyrogenes peterwegii "peering" out of its leafy nest with false eyes, which in turn mimic the eyes of a snake, thereby protecting the pupa from small feather-brained birds.
Seaweeds in a a tidepool on the coast of Maine.
Wild-type and transgenic Arabidopsis plants expressing miR156, a microRNA that promotes juvenility and increases the rate of leaf initiation
motility mutants stab-inoculated on a 0.3% agar motility plate. The “halos” and
“rings” likely reflect the motility of this archaeon following gradients of
attractant or repellent chemicals.
Use the links on the left for detailed contact information and resources pertaining to each entity.
University of Pennsylvania /// 102 Leidy Laboratories /// 433 S University Ave. /// Philadelphia, PA 19104-6313 /// P: (215) 898-7121 /// F: (215) 898-8780
© 2017 The Trustees of the University of Pennsylvania