The most structurally complex animal phylum is the ____________, in which members possess a stiffening

____________, a tubular dorsal nervous system. Fill in the blank(s) with the appropriate word(s).


Chordata; notochord

Environmental & Atmospheric Sciences

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Calcium and sodium ions make up much of the ________ of streams

A) dissolved load B) suspended load C) bed load D) sediment

Environmental & Atmospheric Sciences

Headquarters of large corporations are clustered in world cities, and shares of these corporations are bought and sold on the stock exchanges located in world cities

Indicate whether the statement is true or false.

Environmental & Atmospheric Sciences

A body or rock of considerable thickness with characteristics that distinguish it from adjacent rock units is called a(n)

A. formation B. contact C. outcrop D. bedding plane

Environmental & Atmospheric Sciences

Consequences of sediment pollution include more rapid infilling of reservoirs and clogging of stream channels.

Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences