1. Once population size is reduced by habitat fragmentation, the keyfactor driving the species toward extinction is...
A. too many animals migrating between populations
B. loss of genetic variation
C. too many animals migrating away from small populations
D. increased risk of predation
E. loss of food
2. sustainable development...
A. will require many people to contribute financially
B. will require global, mulinational cooperation
C. will speed up evolution
D. will require making difficult decisions regarding travel toother planets
E. cannot be achieved