____ occurs when a population is too small to sustain its role in biological communities.
A. Ecological extinction
B. Local extinction
C. Biological extinction
D. Natural selection
E. Speciation
Answer: A
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What will be an ideal response?
Freezing rain:
A) requires a layer of cold air near the surface. B) is not associated with temperature inversions. C) leaves the bottom of clouds as supercooled droplets. D) is commonly associated with thunderstorms.
The world record for the longest period without rainfall occurred in a
A) polar desert. B) sub-tropical desert. C) rain-shadow desert. D) coastal desert.
What African leader envisioned the political unity of Africa?
A) Nelson Mandela of South Africa B) Jomo Kenyatta of Kenya C) Felix Houphouet-Boigny of Ivory Coast D) Kwame Nkrumah of Ghana E) Robert Mugabe of Zimbabwe