SSC CHSL GK Questions 2026

The International Olympic Committee set this band when it created the Youth Olympic Games so that the event would reach adolescents at the stage when they are choosing whether to continue in sport, and the age is counted as of the year of the Games.

The Youth Olympic Games were proposed by Jacques Rogge, then President of the International Olympic Committee, approved in 2007, and the first Summer edition was staged at Singapore in 2010 for athletes aged fifteen to eighteen.

G. Evelyn Hutchinson distinguished the fundamental niche, which is the full range of conditions and resources a species could use if nothing interfered, from the realised niche, which is the narrower part left to it once competitors, predators, parasites and disease are at work.

A keystone species holds the structure of its community together out of all proportion to its own numbers, exactly as the keystone at the top of an arch holds the stones in place.

Where conditions stay constant and the resource is limiting, the better competitor increases while the weaker one dies out or shifts its niche.

A lichen is a partnership of an alga and a fungus that takes its water and minerals straight from the air, having no protective cuticle and no roots.

Paine introduced the term in 1969 after an experiment on the rocky Pacific shore in which he removed the starfish Pisaster ochraceus from study plots.

An ecotone is the zone where two adjoining ecosystems meet and blend, such as the mangrove belt between land and sea, an estuary between a river and the ocean, or the strip where grassland gives way to forest.

Oceans cover close to seventy-one per cent of the earth's surface and hold about ninety-seven per cent of its water, which makes the marine ecosystem the largest on the planet by both area and volume.

An artificial or man-made ecosystem is one that people create and keep going by their own effort, deciding which species live in it and supplying water, nutrients and protection.

Abiotic components are the non-living parts of an ecosystem, and soil belongs squarely to that list along with sunlight, temperature, water, air, minerals and pH.

An ecosystem is a working unit in which a community of living organisms interacts with the non-living surroundings in a given area, so it must contain both halves.

ONDC is not an application or a marketplace but a set of open protocols, in the same spirit as UPI in payments, designed so that a buyer using one application can discover and order from a seller registered on a different application.

EDI is the computer-to-computer exchange of standard business documents such as purchase orders, invoices, despatch advices and payment instructions, in an agreed format, without paper and without a person re-typing the data at the other end.

This Act is the legal foundation of electronic commerce in India: it recognised electronic records as equivalent to paper records, gave digital and later electronic signatures the status of a signature, provided for certifying authorities, and created the offences under which online fraud such as identity theft and cheating by…

On such a platform both the buyer and the seller are enterprises: a factory sources raw material, components, machinery or packaging from suppliers, and the orders are usually bulk orders with negotiated prices, credit terms and long-term supply contracts.

GeM is an online marketplace on which central and state government departments, public sector undertakings and other public bodies buy common-use goods and services from registered sellers, with the aim of making purchase faster, cheaper and transparent.

HTTPS is HTTP carried inside a protected channel: the browser and the server first exchange a digital certificate and agree on keys, after which card numbers, passwords and addresses travel as cipher text that an eavesdropper on the network cannot read.

M-commerce, or mobile commerce, is the part of electronic commerce conducted on smartphones, tablets and even feature phones over a wireless network, and the term is credited to Kevin Duffey in 1997.

NPCI, set up in 2008 as the umbrella organisation for retail payments in the country, built and runs UPI, which lets a user link several bank accounts to one mobile application and transfer money instantly using a virtual payment address, without sharing account numbers.