Arthus reaction
(Science: dermatology, immunology) a localised inflammation due to injection of antigen into an animal that has a high level of circulating antibody against that antigen.
a haemorrhagic reaction with oedema occurs due to the destruction of small blood vessels by thrombi. It may occur, as in farmers lung, as a reaction to natural exposure to antigen.
The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..
Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..
In this tutorial, the works of Carl Gustav Jung and Sigmund Freud are described. Both of them actively pursued the way h..
Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..
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The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..
This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..