A central element of the immune system has remained constant through more than 400 million years of evolution, according to new research at National Jewish Health. In the September 29, 2011, online version ...

Biology - Evolution

Sep 30, 2011 4.7 / 5 (7) 0 |

What happens to a stem cell at the molecular level that causes it to become one type of cell rather than another? At what point is it committed to that cell fate, and how does it become committed? The answers ...

Biology - Cell & Microbiology

Apr 12, 2012 5 / 5 (1) 0 |

(Phys.org) —Malignant catarrhal fever (MCF) is a disease that is almost always fatal in cattle. Cows contract MCF after coming into contact with wildebeest carrying a form of herpes virus known as alcelaphine ...

Biology - Plants & Animals

Apr 30, 2013 5 / 5 (1) 0 |