Todd unit
The unit in which the results of testing for antistreptolysin O (ASO) are expressed. It denotes the reciprocal of the highest dilution of test serum at which there continues to be neutralization of a standard preparation of the streptococcal enzyme streptolysin O.
This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..
Part of the genetic information is devoted to the synthesis of proteins. mRNA, a type of RNA, is produced as a transcri..
This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..
Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..
Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..
Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you..
