IB ESS Exam
calculate doubling time - Answer-NIR (70) = (CBR - CDR) / 10
70 / ? = Doubling Time
3 reasons for changes in age gender pyramid (3 pts) - Answer-Lower fertility rates: access to family
planning, improved women edu.
Aging population (improved health care), few young people replace older adults as they pass,
migration patterns change: more adults move for work/education
why difficult to determine exact number of species in Costa Rica - Answer-the country has a high level of
biodiversity and many species are still undiscovered or undocumented.
some species have are limited, difficult to study them.
3 ways development of protected areas improved the conservation of species in costa rica - Answer-
Habitat Preservation, Restoration of Degraded Areas, Reduction of Human Disturbance
one criterion to determine IUCN Red List status of jaguar - Answer-depends on population size and
trends, geographic range, and habitat fragmentation and degradation.
calculate doubling time - Answer-NIR (70) = (CBR - CDR) / 10
70 / ? = Doubling Time
3 reasons for changes in age gender pyramid (3 pts) - Answer-Lower fertility rates: access to family
planning, improved women edu.
Aging population (improved health care), few young people replace older adults as they pass,
migration patterns change: more adults move for work/education
why difficult to determine exact number of species in Costa Rica - Answer-the country has a high level of
biodiversity and many species are still undiscovered or undocumented.
some species have are limited, difficult to study them.
3 ways development of protected areas improved the conservation of species in costa rica - Answer-
Habitat Preservation, Restoration of Degraded Areas, Reduction of Human Disturbance
one criterion to determine IUCN Red List status of jaguar - Answer-depends on population size and
trends, geographic range, and habitat fragmentation and degradation.
