Heterogenetic antigen An antigen which is possessed by a variety of different phylogenetically unrelated species; e.g., the various organ-or tissue-specific antigens, the alpha-and beta-crystalline protein of the lens of the eye, and forssman antigen. Synonym: heterophil antigen...
Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..
Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..
Meet some of New Zealand's unique fauna, including endemic insects, frogs, reptiles, birds, and mammals, and investigate..
Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..
The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..
Genes are expressed through the process of protein synthesis. This elaborate tutorial provides an in-depth review of the..
