JPSC JPCS PCS Pre Archives - Page 14 of 15

Classification of Eco-system

Natural Ecosystem- Terrestrial- Forests, Grasslands, Deserts Aquatic- Fresh Waters, Saline Waters, Marine Waters Ecotone :- a zone of junction between two or more diverse ecosystems. For e.g. the mangrove forests represent an ecotone between marine and terrestrial ecosystem. Characteristics of Ecotone It may be very narrow or quite wide. It has the conditions intermediate … Read more

Inter-governmental action

IPCC UN Conference on Environment and Development (Earth Summit), 1992 Agenda 21 An action plan of UN relating to sustainable development adopted at the Earth Summit, 1992 UNFCCC Kyoto Protocol IPCC 1988 by World Meteorological Organisation and UNEP tasked with reviewing and assessing the most recent scientific, technical and socio-economic information produced worldwide relevant to … Read more

MANGROVES

Mangroves are the characteristic littoral plant formation of tropical and subtropical sheltered coastlines. are trees and bushes growing below the high water level of spring tides which exhibits remarkable capacity for salt water tolerance. basically evergreen land plants growing on sheltered shores, typically on tidal flats, deltas, estuaries, bays, creeks and the barrier islands. … Read more

Tsunamis

A tsunami is a very long-wavelength wave of water that is generated by sudden displacement of the seafloor or disruption of any body of standing water. Tsunami are sometimes called “seismic sea waves”, although they can be generated by mechanisms other than earthquakes. Tsunami have also been called “tidal waves”, but this … Read more

Agricultural Crops of India

Crop State Prod Prod Yield Rainfall Temp Soil % (Mil Kg/Ha cm Deg C T) Rice W. Bengal 15 87 1900 125-200 cm >23 C Deep Fertile UP 14 Clayey or loamy Andhra Pr 13 soil Punjab 11 Wheat UP 35 74 2700 80 cm 10-25 C Light loam Punjab 20 Sandy Loam … Read more

Genome and Various Genome Projects for RAS/RTS Exam

1000 Genomes Project
launched in January 2008, is an international research effort to establish by far the most detailed catalogue of human genetic variation.
Human Genome Project
HGP was an international scientific research project with a goal to determine the sequence of chemical base pairs which make up DNA and to identify and map the genes of the human genome. Began in 1990 and ended in 2003.
Genome
The genome is the entirety of an organism’s hereditary information. It is coded either in DNA or RNA (for many viruses).
International HapMap Project
The International HapMap Project is an organization whose goal is to develop a haplotype map of the human genome, which will describe the common patterns of human genetic variation. It is a collaboration among researchers at academic centers, non-profit biomedical research groups and private companies in Canada, China, Japan, Nigeria, UK and the US.
1000 Plant Genomes Project
Started in 2008, the aim of the project is to obtain the transcriptome (expressed genes) of 1000 different plant species. Headed by Dr. Wong and Dr. Deyholos of the University of Alberta.

Major types of rocks and their characteristics

They are aggregates or physical mixture of one or more minerals. Minerals on the other hand are made up of two or more elements in a definite ratio. They have a definite chemical composition. Crust is made up of more than 2000 minerals, but out of these, 6 are the most abundant and contribute … Read more

Citizen’s Charter

Citizen’s Charter is a document which represents a systematic effort to focus on the commitment of the Organisation towards its Citizens in respects of Standard of Services, Information, Choice and Consultation, Non-discrimination and Accessibility, Grievance Redress, Courtesy and Value for Money. The main objective of the exercise to issue the Citizen’s Charter of an organisation … Read more

DESERT ECOSYSTEM

Deserts are formed in regions with less than 25 cm of annual rainfall, .or sometimes in hot regions where there is more rainfall, but unevenly distributed in the annual cycle. Lack’ of rain in the mid latitude is often due to stable high pressure zones; deserts in temperate regions often lie in “rain shadows”, … Read more

BIOGEOCHEMICAL CYCLE

The elements or mineral nutrients are always in circulation moving from non-living to living and then back to the non-living components of the ecosystem in a more or less circular fashion. This circular fashion is known as biogeochemical cycling (bio for living; geo for atmosphere). Nutrient Cycling: The nutrient cycle is a concept that describes … Read more