• Biology

    Immunity

    Immunity is the ability of an individual host to resists development of disease and allergy even after having received an infective dose of the pathogen with complete virulence and the various allergens.Immune system is the system of animal body which protects it from various pathogens / infectious agents/allergens and cancerImmunology is the science of development of immunity against particular pathogen or allergenThe foundation of the science of immunology was laid by three workers: Edward Jenner ( 1796)A risky inoculation of small pox pustule through a scratch on vein was performed in Turkey and other eastern countries. Jenner noticed that milk – maids did not suffer from small pox though they…

  • Biology

    Rh Factor and How it Works

    We know that people have different blood types. What this means is some people have one “factor” and some don’t. Some have A, and some have B, and some don’t have either. We call them type A, B and O (think of “zero” if it helps). If you needed a blood transfusion you would have to get it from someone who has the same blood factors which you have — or else from someone who doesn’t have those blood factors, someone who is type “O” (without A or B). If you were given the wrong blood, your body would attack and destroy the new blood like a foreign invader —…

  • Biology

    Biological Classification

    In our daily life, we come across several animals, plants, and microbes, which have been named in order to understand their importance and to communicate with them. However, this communication about organisms becomes difficult in an area or a region where they do not occur or if they occur but are recognized by some other name. Further, organic evolution has caused a great number of biodiversity adding another problem to biologists to remember, and to identify new ones. All these factors contribute to a need for developing a system, called taxonomy.Taxonomy is the branch of science dealing with naming, Taxonomy is the branch of science dealing with naming, the grouping…

  • Biology

    DIVERSITY IN THE LIVING WORLD

    Life can be defined as the unique complex organization of molecules expressing itself through chemical reactions ( metabolism) which lead to growth, development, responsiveness, adaptation and reproduction. Living things possess certain characteristics, which makes them different from non-living things. CHARACTERISTICS OF LIVING BEINGS METABOLISM  Metabolism is a process by which all living things assimilate energy and use it for various purposes like growth, movement, development, responsiveness, reproduction, etc Chemical reactions are classified into catabolism and anabolism Catabolic activities  Catabolic activities release energy Energy liberating reactions are termed as ‘exergonic’ These are some total of breakdown or destructive process. These reactions from simple substances from complex ones C6H12O6 + 6O2    →…

  • Biology,  Cell biology

    WHAT IS CELL?

    [vc_row][vc_column][vc_column_text]The cell (meaning “small room”) is the basic structural, functional, and biological unit of all known living organisms. All living organisms are made up of building blocks we call the cell. Many living things consist of vast numbers of cells working in concert with one another. A number of cells in an organism varies. The cell is surrounded by a cell or plasma membrane. which contains many biomolecules such as proteins and nucleic acids. Cell consists of different organelles like cell nucleus, Mitochondria, Endoplasmic reticulum, Golgi apparatus, Lysosomes, Peroxisomes, centrosome, Vacuoles, Ribosome. In some organ­isms, the body is made up of many cells (multicellular) while in others it is made up of a single…

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