Reading passages

 
 
88 
Ecologists have recently discovered dozens of 
infectious wildlife diseases that pose a significant 
threat to the conservation of global biodiversity 
and the health of an expanding human 
population. For example, a newly discovered 
fungal disease has been linked to the drastic 
decline and possible extinction of amphibians in 
the rain forests of Central America and Australia. 
Other diseases have led to the extinction of 
African wild dog populations and blindness of 
kangaroos in Australia. Since wildlife can act as a 
natural reservoir for diseases that are extremely 
virulent among humans, such as influenza and 
West Nile virus, as the human population expands 
into wildlife habitat, the conditions ripen for a 
new disease to emerge. Emerging infectious 
diseases of wildlife are caused by the spillover of 
pathogens from domestic animals to wildlife 
populations, the transport of domestic and 
wildlife species around the globe, and even climate 
change in pristine wilderness areas.
106- Among the reasons of the emergence of 
infectious diseases, one not mentioned in the 
passage is ............ .
A) the distribution of animals all over the world 
B) passing of micro-organisms from the tamed 
animals to the wild ones 
C) simplicity of the curing methods of contagious 
illnesses 
D) the expansion of the human populations to the 
wilderness 
E) changing of the climates in the habitats of the 
wild animals 
 
107- The extinction of amphibians in the rain 
forests of Central America and Australia could 
have been caused by .................. .
A) some infectious diseases that are still unknown
B) the expansion of mankind to new fertile regions
C) a fungal disease which has been detected lately
D) the fact that ancient people were ignorant of 
health-care 
E) unsanitary living conditions ancient tribes were 
in