trustle > EngliSea > QUIZ > Nature
 
 Beavers
The beaver's incisors are strengthen with _____ which make them orange. They grow continuously and even self sharpen. -- iron/copper/gold
http://qindex.info/d.php?c=5457#932
 
 Beavers
In the Rocky Mountains beaver dams slowly filter billions of tons of water. The ponds build up soil and nutrients and help prevent floods and _____. -- droughts/pollution/global warming
http://qindex.info/d.php?c=5457#3886
 
 Philippine Eagle
By about two months old its soft down is replaced with feathers and soon it develops its iconic _____ like crest. -- mane/horn/crown
http://qindex.info/d.php?c=5457#5456

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