Who among the following innovated road construction method. during Industrial Revolution?

 Which of the following was called by Mahatma Gandhi "A post - dated cheque"?

In which Tamil epic the story of Kovalan and Madhvi is given?

Single flower is-

The combination of male and female gametes is called-

Somatic reproduction is found in-

The reason for the browning of the cut apple is present in the apple-

Which of the following substances is found in green henna, due to which it turns red?