A(n) ________ is a low layer of dark gray clouds that produces precipitation
A) cumulonimbus
B) altostratus
C) cirrus
D) cirrostratus
E) nimbostratus
E
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For the purpose of gathering comparable data, the United Nations has imposed a precise definition of the meaning of urban upon the world's states
Indicate whether this statement is true or false.
Matching
a. functional diversity c. ecological diversity b. genetic diversity d. species diversity 1. Caribbean snails of the same population exhibit a variety of shell colors and banding patterns. 2. Coastal states in the United States typically have more ecosystems than land-locked states. 3. Some tropical forests contain thousands of producer species. 4. Nutrients typically cycle much faster in tropical areas than in polar areas. 5. Estuaries and wetlands have very high primary productivity. 6. Coral reefs are known for their very high number of species. 7. Areas with both mountain ranges and coastal ecosystems have high diversity. 8. An early fox population evolved into the grey fox and arctic fox.
The boundary between the zones of accumulation and wastage is called the ____________________
Fill in the blank(s) with correct word
Long oceanic mountain chains typically are characterized by ________
A) granitic plutons and batholiths B) rocks older than 1 billion years old C) highly deformed sedimentary rocks D) layers of igneous rocks