Now showing items 11-14 of 14
The Evolution of Temporal Polyethism
Temporal polyethism is a method of division of labor exhibited by many eusocial insect colonies, where the type of task an individual attempts is correlated with its age. The evolutionary pressures that give rise to this widely-observed pattern are still not fully known. The long generation times of eusocial insects combined ...
Enhancing Evolution: When Spatial Structure and Environmental Change Improve Adaptation
Evolution by natural selection is the primary creative force in biology. In order for populations to thrive, or even survive, requires a continual generative process. An understand of the process of natural selection, its strengths and weaknesses, is necessary for both predictions about the future course of life, as well as ...
The what, when & how of seedling growth regulation.
Photomorphogenesis has two stages. First, seedlings detect light and open their embryonic leaves (cotyledons). Second, seedlings optimize their light environment by regulated elongation of the embryonic stem (hypocotyl). Several hormones, including auxin, brassinosteroids (BR) and gibberellins (GA), orchestrate the growth of ...
Temperature gradients drive functional heterogeneity within muscle
During locomotion, muscles respond to an animal's varying need for speed, endurance, strength, and agility. Therefore, in addition to operating as motors, muscles also act as brakes, springs, and struts. Interestingly, if the physical, morphological, and neurological parameters determining muscle performance vary regionally, ...