Ammonia is the excretory substance of

Options :
  1. reptiles
  2. tadpoles
  3. birds
  4. mammals
Answer and Explanation :-

Answer: Option 2

Explanation:

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Totally without hope one cannot live. To live without hope is to cease to live. Hell is hopelessness. It is no accident that above the entrance to Dante's hell is the inscription: "Leave behind all hope, you who enter here.
-Jürgen Moltmann Theology of Hope