Which of the following competes with a natural messenger and stimulates a receptor?

A) an agonist
B) an antagonist
C) both a and b
D) neither a nor b


A

Environmental & Atmospheric Sciences

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Until the Industrial Revolution of the late 1700s, the volume and velocity of world trade were constrained by technologies limited to those based on

A) wood, wind and water. B) coal, steel and rail. C) oil, plastics and roads. D) human labor and animal power.

Environmental & Atmospheric Sciences

The ________ is measured in cross-sectional view as the angle of inclination from horizontal of a tilted rock layer, and ________ is viewed in map view as the compass bearing of the rock layer where it intersects a horizontal plane.

A. strike; dip B. strike and dip; strike and dip C. dip; dip D. strike; strike E. dip; strike

Environmental & Atmospheric Sciences

What is the mass number of the element produced when an element with mass number A emits a positron?

A) A __ 2 B) A __ 1 C) A D) A + 1

Environmental & Atmospheric Sciences

List the two broad, traditional subject areas of geologic study

What will be an ideal response?

Environmental & Atmospheric Sciences