Which of the following given statements are incorrect? (i) There are many animals that have become extinct in the wild but continue to be maintained in zoological parks. (ii) Cryopreservation techniques and seed banks are a methods of ex situ conservation. (iii) Endemic species confined to specific region and not found anywhere else. (iv) In the Earth Summit on Sustainable Development, 190 countries pledged to reduce the current rate of biodiversity loss at global, regional and local levels by 2010. (v) By using cryopreservation technique, sperms, eggs, animal cells, tissues and embryos can be stored for long period. (vi) Amazon forest contributes 14% of the total oxygen in the atmosphere on earth.