Some coastal landforms are built by sea creatures capable of producing rocklike material called ________.
A) polyps
B) clay
C) calcium carbonate
D) granite
E) sand
Answer: C) calcium carbonate
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ArcGIS can work with both internal and external relational databases.
Answer the following statement true (T) or false (F)
Entrainment refers to the tendency of thunderstorms to form in a line-like pattern or sequence
Indicate whether the statement is true or false
Which of the following best matches the description?Photosynthetic free-floating marine organisms.
A. biochemical oxygen demand B. tundra C. deciduous forest D. pioneer community E. grassland F. phytoplankton G. savanna H. desert I. boreal forest J. pelagic K. littoral zone L. marsh M. periphyton N. benthic O. euphotic
When the quantity of environmental protection is low so that pollution is extensive, then there are usually ______________ to reduce pollution and the ______________ .
A. a few inexpensive and easy ways; average benefit are slightly higher B. a lot of expensive and innovative methods; marginal benefits are quite high C. only a few expensive and innovative methods; average benefits are higher D. a lot of cheap and easy ways; marginal benefits of doing so are quite high