Questions

The act of formally approving something is known as Ratification.

Mitochondria are present in both plant and animal cells.

Kathak, Nauntanki, Jhora and Kajri are the important dances of Uttar Pradesh.

A closed room is aplace where charcoal is burnt in limited supply of air. There is every chance for the formation of the deadly poisonous carbon monoxide, which when inhaled, reacts with the iron in haemoglobin of blood and prevents the supply of oxygen. It is said to be treacherous as there can be no previous warning of its presence because it is an odourless and colourless gas.

In token Ring , hub is called Multistation Access Unit(MAU).

Rafael Nadal defeated Daniil Medvedev in the men's singles title at the 2019 US Open. It was Nadal's 19th Grand Slam singles title, and fourth US Open title.