Science

Parthenogenesis Parthenogenesis, a reproductive strategy that involves development of a female (rarely a male) gamete (sex cell) without fertilization. It occurs commonly among lower plants and invertebrate animals (particularly rotifers, aphids, ants, wasps, and bees) and rarely among higher vertebrates. An egg produced parthenogenetically may be either haploid (i.e., with one set of dissimilar chromosomes) … Read more

Cell structure and its functions Cell is the smallest structural and functional unit of an organism, which is typically microscopic and consists of cytoplasm and a nucleus enclosed in a membrane. Structure of cell The cell is a basic unit for life forms. As well as enabling sophisticated control of biochemical processes by providing compartments … Read more

The objective of the policy is, to quote, “at meeting the growing demands on satellite communication requirements, promotion of space based communication activities by industry, advancements in the relevant indigenous technologies for self-sustenance and protection of space assets needed for the country”. The norms classify upstream SATCOM activities viz., launch and operation of Satellite communication … Read more

    Antigen Antibody Overview Substance that can induce an immune response Proteins that recognize and bind to antigens Molecule type Usually proteins, may also be polysaccharides, lipids or nucleic acids Proteins Origin Within the body or externally Within the body Image   The Role of Antigens & Antibodies in Vaccinations Vaccines contain antigens which … Read more

In the 60s and 70s, developed nations like the US, UK, Germany, France and Japan were racing ahead by developing newer technologies and consumer products that were change lifestyles leading to a shift from conservative to indulgent energy consumption. Everything seemed fine until leading oil producing nations, grouped under OPEC and led by the largest … Read more

Microdots are a globally proven technology to ensure originality in spare parts of machines and components, including in the automobile sector. The microdot technology involves spraying thousands of microscopic dots onto vehicles or other assets to form a unique identification. Each microdot carries this identification which is registered to the owner, but is not visible … Read more

Dry cell batteries create electrical energy by converting chemical energy into electricity. The exact means of doing so depends on the type of dry cell battery in question, but the materials that are used are generally zinc and carbon or zinc and manganese dioxide. These materials are placed within the electrolyte paste within the battery. … Read more

A hydroelectric power plant consists of a high dam that is built across a large river to create a reservoir, and a station where the process of energy conversion to electricity takes place.The first step in the generation of energy in a hydropower plant is the collection of run-off of seasonal rain and snow in … Read more

Universal Health coverage means accessibility of health care to one and all without creating financial hardship. According to WHO, out of pocket expenditure in health sector is 63% whereas the recommended level is 10-15%. There are problems associated with health sector: Expenditure on health is just 2.5% of GDP it has to be near about … Read more

Applications of tissue culture Rapid Clonal Propagation A clone is a group of individuals or cells derived from a single parent individual or cell through asexual reproduction. All the cells in callus or suspension culture are derived from a single explants by mitotic division. Therefore, all plantlets regenerated from a callus/suspension culture generally have the … Read more