What is another episode in the cycle of evolution?

_____________ was the first stand erect stage of evolution.

  Which animal drawn chariot became the symbol of authority?

____________ came after Neolithic age.

 Mid stone age developed _______________ language .

 ______ age is supposed to be the boundary bridge between old stone age and civilized world.

 Mesolithic age is also known as

According to the nature of our requirements, the size of the ______________ also changes.