Questions

- Process management

- Main memory management

- File management

- I/O system management

- Secondary storage management

- Networking

- Protection system

- Command interpreter system

 A Lighthouse

Thailand

Simhika

Plants grow in size both in height and in girth. Enlargement of cells already present cannnot contribute much to the growth. Only addition of more and more cells could increase the size of the plant considerably.

According to Guiness World Records, the world's oldest living man Masazo Nonaka has turned 113 years on 25 July of 2018 in Japan's Hokkaido.

Francisco Nunez Olivera was the former oldest person who died on 29th of January 2018 at the age of 112 years.

Les Colley (1898 - 1998, Australia), is the oldest ever man to father a child. He had his ninth child a son named Oswald to his third wife at the age of 92 years 10 months.

Any two amino acids vary structure by the r-group, otherwise all amino acids are in the same structure. All amino acids have in common carboxyl group -COO , amino group -NH3+ and a hydrogen -H and a r-group which are all bonded to a central carbon.