Class 8 Biology - Reaching the Age of Adolescence (Worksheet)Fill in the blanks with suitable words.1. The period of life, when the body undergoes certain noticeable changes, leading to reproductive maturity is called __________. 2 _______ is the start of the time when a boy is biologically ready to become a father and a girl is ready to become a mother.3. ______ are thread-like structures in the