Which disorder results when one or more parts of the immune system are missing or not functioning properly?

Aboy with an extra x chromosome probably has which of the following syndromes?

What are the two main phases of a cell cycle

Lola needs to sign 6 invitations. using stopwatch that measures time to tenths of a second, it takes lola 5.3 seconds to sign her full name. going by the accuracy of the stopwatch, which is the most accurate determination for the number of minutes lola needs to sign all 96 invitations