Science

The immune system is a complex network of cells and organs that work together to defend against Foreign substances. There are various cells associated with immune system: B-cell: It is a type of white blood cell that makesantibodies. Antibodies are large Y-shaped proteinswhich bind to specific antigens. This signals theother cells of the immune system … Read more

  A person can live a normal, healthy life with just one kidney. However, at least one kidney must function properly to maintain life. Diseases that threaten the health and functioning of the kidneys include kidney stones, infections, and diabetes. Kidney stones are mineral crystals that form in urine inside the kidney. They may be … Read more

VOIP is IP enabled voice calling technology over internet. Example: Skype, Yahoo messenger,MSN messenger.It requires broadband connectivity to make a call along with IP enables  like Computers,Smartphone etc.The voice is converted into digital packets and transmitted to destination over packet switchednetwork. Advantages of VOIP are: Cost of calling is cheaper than normal phone. No need … Read more

The first human vaccines against viruses were based using weaker or attenuated viruses to generate immunity. The smallpox vaccine used cowpox, a poxvirus that was similar enough to smallpox to protect against it but usually didn’t cause serious illness. Rabies was the first virus attenuated in a lab to create a vaccine for humans. Egg-Based … 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

Net neutrality is the principle that internet service providers and governments should    treat all data on the internet equality , not discriminating or charging differently by user, content, site, platform application, type of attached equipment or mode of communication.      It is about not giving special privileges to some website like in the form of speeding … 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

parasitic nutrition In this type of nutrition, the organisms (called parasites) depend on the body of other living organisms (called their host) for getting their food. Many viruses, bacteria, fungi and animals have this mode of nutrition. The organisms which depend on other living organisms (host) for food are called as parasites. Parasites of two … Read more

Directional Movements Directional changes are called tropic movements. Tropic movements are the one which occurs in the direction of the stimulus. Positive phototropism is responding by bending towards the sunlight which can be seen in shoots. Negative geotropism is growing away from the ground which is also shown by shoots. Roots exhibit negative photo tropism … Read more

:  Nitrogen is the most abundant gas in the atmosphere and it is in inert form. But when it converts into reactive form like ammonia, nitrous oxide and nitrogen di oxide, it become dangerous for the ecosystem in many ways. Nitrogenous gases also play an important role in global climate change. Nitrous oxide is a particularly … Read more