RRB Group D GK Questions 2026

In 1665 Hooke looked at a thin slice of cork under his self-made microscope, saw tiny box-like compartments and named them cells, from the Latin word cella, meaning a small room.

This is false because viruses have no chlorophyll, no cell organelles and no metabolism of their own, so they cannot make food in any way.

Starlight bends as it passes through layers of air of changing temperature and density, and because these layers keep moving, the star's apparent position and brightness flicker.

Buoyancy, also called upthrust, is the upward force that a liquid or gas exerts on any object placed in it.

Water gas is made by passing steam over red-hot coke, and the reaction C + H₂O → CO + H₂ gives carbon monoxide and hydrogen in roughly equal volumes.

In an apple, the fleshy part we eat develops from the thalamus, the swollen tip of the flower stalk, and not from the ovary, which is why it is called a false fruit.

The associations of 1836 to 1885 were run by landlords, lawyers, teachers and journalists, drew their membership from the English-educated and propertied classes, and worked mainly in Calcutta, Bombay, Madras and Poona.

The session had originally been planned for Poona, but an outbreak of cholera there led to the change of venue to Bombay.

Surendranath Banerjee's Association called the first National Conference in Calcutta in December 1883, bringing delegates from several parts of India to discuss questions of national importance, and it held a second conference in December 1885.

The Madras Mahajana Sabha was founded that year by M. Viraraghavachariar, G. Subramania Iyer and P. Anandacharlu as a presidency-wide body for southern India, and it held a conference in Madras in December 1884 that brought together representatives of local associations.

They founded the Bombay Presidency Association in 1885, partly in reaction to the European hostility shown during the Ilbert Bill controversy, and the body became the main platform of western India in the year the Congress was born.

It appealed to a somewhat wider social group than the landlord bodies that preceded it, and within a year many of its members moved into the Indian Association.

In 1876 the maximum age for the Indian Civil Service examination was reduced, which made it even harder for Indian candidates, who had to travel to England to sit the examination, to qualify.

It aimed to create a strong body of public opinion, to unify Indians on common political questions, to promote Hindu and Muslim friendship and to draw the masses into public movements, and it kept the membership fee low so that poorer people could join.

The Sabha was set up in Poona in 1870 to act as a bridge between the government and the people, and its members held written authority from the villages around Poona to speak on their behalf, which gave it a representative character unusual for the time.

He had already formed the London Indian Society in 1865, and in 1866 he founded the East India Association in London, with branches later opened in Bombay, Calcutta and Madras.

The Landholders' Society of 1838 spoke for the zamindars of Bengal, Bihar and Orissa, while the Bengal British India Society of 1843 was set up with the help of George Thompson to collect and publish information on the condition of the people.

It discussed questions of public interest and sent representations to the government, and because it came before every other body of its kind it is counted as the first political association in India.

The Kiel Canal is cut across the neck of the Jutland peninsula in northern Germany and allows ships to pass between the North Sea and the Baltic without sailing all the way round Denmark, saving several hundred kilometres and avoiding the rough waters off the Skagerrak.

The Trans-Andean Railway was built to join the Pacific coast of South America to the Atlantic coast, running from the Chilean port of Valparaiso across the Andes to Buenos Aires in Argentina.