Nutrients in coral reefs are ____.?
A) ?extremely limited, which is why productivity is lower than the deep ocean
B) ?so plentiful that there is no limit to phytoplankton growth
C) ?largely trapped below the pycnocline
D) ?recycled efficiently because the water is shallow
D
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A functional region is:
A) derived from people's sense of identity and attachment to different areas. B) non-existent in developing nations. C) an area that possesses one or more unifying cultural or physical traits. D) an area unified by a specific social, cultural, or economic activity. E) an area that possesses only one specific cultural trait.
A fossil that is particularly useful for correlation is an evolutionary fossil. Indicate whether the statement is true or false
vascular or non: fern
What will be an ideal response?
A deposit of loose sand may have a porosity of ________ percent.
A. 40-50 B. 30-50 C. less than 20 D. 20-30 E. more than 50