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Zymogens, or proenzymes, are enzymes secreted in inactive form. Under certain conditions, a zymogen shifts to the active form of the enzyme. Zymogen secretions in general occur due
Chemical Stress - Mineral composition The living systems make use of several mineral ions that they might have encountered at the very origin or during evolution, particularly
What is natural selection? Natural selection is the method by which organisms that have certain favorable traits are better capable to survive and make successfully than organi
Evolution of Horse - Credit to Prof. C. Marsh (1879) of Yale University for complete work. S.No Fo ssil/Genus Period
HEARIN G - Sound waves struck ear drum, it starts vibrations, these vibrations are carried to MIS → f. ovalis → S. vestibule → Hellicotrema → S. Tympani → f. rotundus → mi
Colonial Theory - Metazoa This is the most popular theory on the origin of Metazoa. The idea was conceived by Haeckel (1874) modified by Metschnikoff (1886) and revived by Hy
COMPOSITION OF CELL WALL Cell wall composed of cellulose, hemicellulose, pectin, lignin, cutin & chitin. Cell wall consists of 3 parts - 1. Matrix Highly cross-
levels of biological organization in order from smallest to largest
What is Mitochondria ? Mitochondria are the cellular organelles responsible for the conversion of energy into a form called ATP. ATP is a high energy chemical compound that cel
Therophytes - Classes of Life Form These are annual plants of the summer season or of the favourable season. They complete their life cycles in a single favourable season and
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