Questions

Vienna has become the world's most pleasant city to live in by topping the Global Liveability Index of the Economist Intelligence Unit by dislodging Melbourne, the Austrian capital.

While Damascus retained the last place and Dhaka, Bangladesh's capital was in second last place in the annual survey examined 140 metropolitan cities.

Exercise frequency refers to number of times you exercise per week.

In transfusions of packed red blood cells, individuals with type O Rh D negative blood are often called universal donors. Those with type AB Rh D positive blood are called universal recipients.

The immune system of a person with AB blood will accept blood from all possible donors, whether they have O, A, B, or AB blood. Since both A and B antigens are present in a person with AB blood, the recipient won't reject the blood. The body identifies that blood as "self" rather than "foreign."

Ribosomes comprise a complex macro molecular machine, found within all living cells, that serves as the site of biological protein synthesis. Ribosomes link amino acids together in the order specified by messenger RNA molecules.

The first attempt in printing was made in England by William Caxton.

William Caxton was an English merchant, diplomat, and writer. He is thought to be the first person to introduce a printing press into England, in 1476, and as a printer was the first English retailer of printed books.