The Precambrian-Cambrian boundary represents the first appearance of ____

A)vertebrates
B)amphibians
C)reptiles
D)animals with skeletons
E)animals with soft bodies


D

Environmental & Atmospheric Sciences

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The higher the Air Quality Index, the better the quality of the air

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

A valley train is a(n) _____

a. string of lakes in a glaciated valley b. deposit of till where a hanging valley entered the trunk glacier c. first-order tributary glacier d. depositional landform composed of glacial outwash left by braided streams e. ice-scoured plain

Environmental & Atmospheric Sciences

If coastal winds are blowing offshore producing a land breeze, the time of day is most likely ____

A) ?just after sunset B) ?late morning C) ?afternoon D) ?noon

Environmental & Atmospheric Sciences

Based on observations, geologists have determined that this factor does not help to determine whether a stream will have a meandering or braided pattern

A) bank stability B) stream power per stream bed area C) discharge variability D) channel slope

Environmental & Atmospheric Sciences