Questions

In the brain cerebellum, the arbor vitae refers to the cerebellar white matter which resembles the structure of arborvitae plant leaves and branches structure.

Genes : The DNA is the genetic material. The DNA is made of several nucleotides. A nucleotide means, one nitrogenous base one sugar molecule and a phosphate molecule. These nucleotides occur in sequences and several nucleotides form one Gene ( a functional mgene is called a cistron)

In 37 BC, Octavian became the most powerful man in the Roman Empire for 44 years under the titles of Augustus, which meant 'holy' and imperator, meaning 'Victorious general'. He also called himself Princeps, 'first citizen of the state'. The period of Roman history beginning with his rule upto A.D 284 is called the principate. His rule and the period following it were  peaceful and  are known in history as 'Pax Romana' which means 'Roman Peace'

A Jig saw puzzle pieces are in different colors which have different shapes. 

You can put it anywhere you like but there is only one right place for it to be fit in it.