Science

Reflex action is an immediate involuntary response to a stimulus. In an involuntary response, a sensory impulse on reaching central nervous system is itself returned to a specific effector as a motor impulse without neuronal analysis and integration. Reflex responses occur below the level of consciousness. Reflex actions are sudden and autonomic. For instance, if … Read more DMPQ- Explain Reflex action with examples.

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 DMPQ:How energy is generated in Hydroelectric power plant?

Urbanization is a key environmental issue as well. The rapid pace at which urbanization is taking place in the developing world has an impact on climate change and other global environmental issues. Cities account for more than two-thirds of the global energy demand and result in up to 80 per cent of global greenhouse gas … Read more DMPQ- Examine the Role of Science and Technology in Urbanisation.

Space technology is not just about space exploration but it has huge role to play in socio-economic field. Socio-Economic development through application of space technology: Survey of various mineral and natural resources have been made possible through remote sensing. Management of these resources, their development conservation and formulation of various policies are affectively done with … Read more DMPQ- .How space technology is playing important role in India’s socio-economic development.

Conventional breeding, especially of crops, livestock and fish, focuses principally on increased productivity, increased resistance to diseases and pests, and enhanced quality with respect to nutrition and food processing. Advances in cellular genetics and cell biology methods in the 1960s contributed to the so-called ‘green revolution’ that significantly increased varieties of staple food crops containing … Read more DMPQ: Explain the Crop breeding and the introduction of GM crops for food production.

Pathogenic Bacteria These bacteria cause great losses to plant and animal popula­tion by causing several diseases. Reduction of Soil Fertility Some facul­tative anaerobic bacteria are available mostly in the oxygen deficient soil which reverse the nitrifying process, thereby causing the loss of a part of its combined nitrogen. They break down the nitrates in a … Read more DMPQ- Mention some harmful bacteria

INTEGRATED MISSILE DEVELOPMENT PROGRAMME:   Missile Type Remark Prithvi Short range Surface to Surface ballistic missile – The Prithvi missile is a family of tactical surface-to-surface short-range ballistic missiles (SRBM) and is India’s first indigenously developed ballistic missile. Development of the Prithvi began in 1983, and it was first test-fired on 25 February 1988 from Sriharikota, … Read more Quick Revision- Type of Missile

. Gene therapy is the treatment of disease by replacing, altering, or supplementing a gene that is absent or abnormal and whose absence or abnormality is responsible for the disease. Gene therapy may use the genetic material, DNA, itself as the means of treatment. Most, if not all, diseases have a genetic factor. The genetic … Read more DMPQ- Explain how gene therapy can impact the future of humans.

It is an infectious and sometimes fatal viral disease. Affects cloven-hoofed animals, including domestic and wild bovids. The virus causes a high fever for two or three days, followed by blisters inside the mouth and on the feet that may rupture and cause lameness. The virus responsible for the disease is a picornavirus, the prototypic … Read more DMPQ- Write a short note on Foot and mouth disease

Rocket engine needs enormous amount of thrust to escape Earth’s gravitational pull. However the chemicals used for engines are Hydrogen and Oxygen (Hydrogen used as a fuel, while Oxygen as a oxidiser) that produces a good thrust, found in Earth in the form of gas. Carrying hydrogen and oxygen in their gaseous form will require … Read more DMPQ- . Point out the differences between cryogenic engine and semi-cryogenic engine.