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...
Freshwater ecosystem is comprised of four major constituents, namely elements and compounds, plants, consumers, and deco..
Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you..
Plants and animals need elements, such as nitrogen, phosphorus, potassium, and magnesium for proper growth and developme..
This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..
Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..
Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..
