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 makes antibodies. Antibodies are large Y-shaped proteins which bind to specific antigens. This signals the other cells of … Read more DMPQ-Write a short note on cells of Human Immune system.

Captive breeding is the process of breeding animals outside of their natural environment in restricted conditions in farms, zoos or other closed facilities. The choice of individual animals that are to be part of a captive breeding population, and the mating partners within that population, are controlled by humans. Advantages: • Endangered animals have a … Read more DMPQ: What is captive breeding programme? Discuss its advantage(SCIENCE)

a) Pyramid of Number: This represents the number of organisms at each trophic level. For example, in grassland the number of grasses is more than the number of herbivores that feed on them and the number of herbivores is more than the number of carnivores. In some instances, the pyramid of number may be inverted, i.e … Read more DMPQ:Explain the following term: a) Pyramid of Number b) Pyramid of Biomass c) Pyramid of Energy

Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields.   Properties of electromagnetic waves: EM waves are composed of oscillating electric and magnetic fields at right angles to … Read more DMPQ: What is electromagnetic waves? Outline the features of electromagnetic waves? (Science)

Euthanasia is the practice of ending the life of a person in a painless way. It is also known also as mercy killing or assisted suicide, it is usually practiced on a terminally ill person. Euthanasia may be legal or illegal, depending upon a country’s jurisdiction. For example, euthanasia is legal in countries like Belgium, … Read more DMPQ: What is euthanasia? Do you think euthanasia should be allowed?

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 DMPQ: What is net neutrality? Write down the significance..

The principle used in the pressure cooker is that the boiling point of water increases with an increase in pressure. Hence option (a) is the correct answer. Pressure cooker has a confined space sealed from all side (except valve which is used to release excess pressure). When heat is supplied to the cooker it first … Read more DMPQ-What is the working Principle behind the working of Pressure cooker

The Global Positioning System (GPS) is a satellite-based navigation system made up of at least 24 satellites. GPS works in any weather conditions, anywhere in the world, 24 hours a day, with no subscription fees or setup charges. The U.S. Department of Defense (USDOD) originally put the satellites into orbit for military use, but they … Read more DMPQ- What is GPS (Global positioning system)? How is India’s IRNSS ( Indian regional navigational satellite system is different from GPS?

A Cryogenic rocket stage is more efficient and provides more thrust for every kilogram of propellant it burns compared to solid and earth-storable liquid propellant rocket stages. Specific impulse (a measure of the efficiency) achievable with cryogenic propellants (liquid Hydrogen and liquid Oxygen) is much higher compared to earth storable liquid and solid propellants, giving … Read more DMPQ- Cryogenic engine. (SCIENCE)

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 DMPQ- What are the threats for Energy security of India?