Questions

When atoi() tries to convert argv[0] to a number it cannot do so (argv[0] being a file name) and hence returns a zero.

The branch of biology that studies the different structures and functions of the cell is called Cell Biology or Cytology.

 
Cell biology (formerly called Cytology), is a Greek word: kytos, "vessel" is a branch of biology that studies the different structures and functions of the cell and focuses mainly on the idea of the cell as the basic unit of life.

The cell (from Latin cella, meaning "small room") is the basic

• Structural,

• Functional (and) 

• Biological unit of all known living organisms. 

A cell is the smallest unit of life that can replicate independently, and cells are often called the "building blocks of life". 

CARICOM is an official United Nations Observer. The Caribbean Community (CARICOM) is a grouping of twenty countries: fifteen Member States and five Associate Members.

Bill.

From the detectives code 0415 7140 7718

Each 4 digits may represent one name

Here 7718 mirror image represent BILL.