A genetic classification system can be based on, among other factors,
A) the interaction of air masses.
B) statistics or other data used to determine general categories.
C) mean annual temperature.
D) mean annual precipitation.
A
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The AIDS crisis in Sub-Saharan Africa has its highest prevalence in
A) West Africa (ex. Ghana, Ivory Coast) B) urban areas across the continent C) East Africa (Kenya, Tanzania) D) Southern Africa (South Africa, Malawi, Zambia) E) Central Africa (Congo, Rwanda, Burundi)
The Appalachian Mountains of the eastern United States are thought to have once been joined with
mountains located in which other continental regions? What will be an ideal response?
The Permian mass extinction event was most likely caused by enormous volcanic (trap) eruptions.
A. True B. False
Threatened and endangered species receive special protection from human activities such as hunting and habitat destruction from agriculture and logging
Because these activities may often continue despite the species' low numbers, the human activities therefore A) are density independent. B) are density dependent. C) represent bottom-up regulation. D) represent harmful abiotic resistance.