1.	What is the primary caused for extinction or endangerment? pollution desertification economic exploitation habitat destruction
2.	What is the greatest environmental challenge of endangered species? the quality of water the quality of air the availability of food the deterioration of the environment in general
3.	What is economic extinction? When a species has disappeared for more than 100 years When it is no longer profitable to harvest a species When the products made from a species are no longer wanted in the market When the products made from a species are confiscated by police
4.	The snow leopard is mainly hunted for its: fur teeth claws meat
5.	Rare butterflies are mostly killed to make: decorative objects hairclips clothing patterns jewelry
6.	Which of the following rivers is not polluted? Rhine River Yangtze River Danube River Lake Baikal None of the above All of the above
7.	Birds of paradise are killed mainly for their: impressive crowns beaks claws feathers
8.	Which of the following is not an indirect cause of extinction? agricultural development hunting pollution mining
9.	About how many acres of rainforest are lost per year? 100,000 500,000 9,550,000 13,000,000
10.	What is the only reason for extinction? habitat loss pollution commercial exploitation natural causes ignorance human activity there is no single cause for an organism's extinction