A species of a large brown bear lived in Siberia about a million years ago. Over time, the northern population became white-colored and acquired heavier fur as it blended into the snowy landscape. The southern population acquired lighter, darker-colored fur as it adapted to forest ecosystems. Eventually, they could no longer reproduce with each other. Which of these terms describes this transition?
A. speciation
B. coincidence
C. transmogrification
D. providence
Answer: A
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Within soil, a natural cycle of
A) decomposers break down detritus to release nutrients used by producers. B) detritus breaks down by the action of weak soil acids to release nutrients used by producers. C) decomposers break down nutrients to release detritus used by producers. D) decomposers break down detritus to release nutrients used by consumers.
Ring of diamonds lies in ________ Africa
A) southern B) northern C) eastern D) western
When analyzing a satellite image of the earth at night; the prosperous countries are lit up, while poor countries are darker
Indicate whether the statement is true or false
Historic earthquakes in the Rio Grande Rift area have had only small to moderate magnitudes, but the continental lithosphere continues to compress and shorten, thus presenting a real hazard for large earthquakes.
Answer the following statement true (T) or false (F)