Tag: "descend" at biology news
Scripps research scientists identify infertility molecule
...egg is fertilized and made into an embryo, it must descend
to the womb and implant there, where it will grow into a fetus. But the factors that control whether an embryo is able to implant successfully inside a womb have not been known. Now Chun and his colleagues have discovered a new molecular pathway tha...
Cells from amniotic fluid used to tissue-engineer a new trachea
...ted mesenchymal stem cells. Mesenchymal stem cells descend
directly from embryonic stem cells and are abundant in the amniotic fluid. They specialize in making connective tissues, including muscle, bone, cartilage, fat and tendon. Fauza's team multiplied the amniotic mesenchymal cells in culture, then "seed...
Fish can determine their social rank by observation alone, study finds
...ts are unable to hold territories and consequently descend
in social status," the authors wrote. "Success in aggressive bouts is therefore crucial to male reproductive fitness, and the ability to infer the relative strength of rivals before engaging them in potentially costly fights should be highly adaptive...
The origin of the brain lies in a worm
... diffusely over their body. Yet, all these species descend
from a common ancestor called Urbilateria. If this ancestor already possessed a nervous system, what it might have looked like and how it gave rise to the diversity of nervous systems seen in animals today is what Detlev Arendt and his group study at...
Is there a pilot in the insect?
...ts. It accounts for the fact not only that insects descend
facing a headwind and ascend with a tailwind, but also that honeybees land with a constant slope and drown when crossing mirror-smooth water1. Behind this astonishing behavior, hidden in the insect's cockpit, are movement detector neurons that act ...