RRB Group D 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.

Akbar raised the Buland Darwaza, the lofty southern gateway of the Jama Masjid at Fatehpur Sikri, in 1601 to mark his conquest of Gujarat, and it ranks among the tallest gateways in the world, approached by a long flight of steps and faced in red sandstone inlaid with white marble.

It is famous for its floor of hand-painted blue Chinese tiles, each of them different, its Belgian glass chandeliers, its clock tower and the copper plates recording the privileges granted to the Jewish community of the Malabar coast.

An Atash Behram is the highest of the three grades of Zoroastrian fire temple, and of the nine in the world eight are in India, at Udvada, Navsari, Surat and Mumbai, with the ninth at Yazd in Iran.

Its name means 'might of Islam', its screen of pointed arches was raised by masons trained in Indian temple technique, and the Iron Pillar stands in its courtyard.

The correct answer is A, Khwaja Moinuddin Chishti, the saint who brought the Chishti order to India and settled at Ajmer, where his tomb became the best known dargah in the subcontinent; the annual Urs there draws pilgrims of every faith, and Mughal emperors from Akbar onwards made the journey.

Vasco da Gama died at Kochi in 1524 and was buried in this church, and his remains were moved to Portugal some years later, though the gravestone is still shown to visitors.

The basilica, completed in the opening years of the seventeenth century, is part of the Churches and Convents of Goa inscribed on the UNESCO World Heritage List.

The gurdwara built on that site is Takht Sri Patna Sahib, one of the five Takhts, and the only one in Bihar.