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The Organic Evolutionary theories explain convincing the origin of life. It also explains how a wide variety of plants and animals came into existence in the world. According to this theory, the world has been evolved and not been created. The theories of evolution is explained in 4 types. They are Theory of inheritance …

Do you know the kidney structure in human body? The kidney is one of the Endocrine glands. It is making “Kinins”, secreting “Rennin“, and “erythropoietin”, forming “1,25-dihydroxy cholecalciferol”. Kidneys are made comprise many functional microscopic units called “Nephrons”. They perform excretory and homeostatic functions, which are 1.3 million nephrons in …

The term secondary structure refers to the interaction of the hydrogen bond donor and acceptor residues of the repeating peptide unit. The two most important secondary structure of proteins, the alpha helix, and the beta sheet were predicted by the American chemist Linus Pauling in the early 1950s. Pauling and …

Meiosis, or reduction division, is a process during which exchange of genetic material between the homologous chromosomes (crossing-over and recombination) takes place and such a division of the genetically material occurs the four daughter cells. Historical Aspects Meiosis was discovered and described for the first time in sea urchin eggs …

The vacuole holds large amounts of water or food. Don’t forget that these can also hold plant waste products. Those waste products are slowly broken into small pieces that cannot hurt the cell. It holds onto things that the cell might need, just like a backpack. Historical aspects Contractile vacuoles …

The muscle is a contractile tissue. Muscle cells are specialized for contractile ability.  The characteristic property of muscular tissue is its ability to contract when excited. The property of conductivity is also well developed in muscular tissue through not to the degree as that of nervous tissue. This topic covers …