The most fundamental structural and functional units of life are ____.
A. atoms
B. molecules
C. compounds
D. cells
E. mitochondria
Answer: D
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Over 90% of active volcanoes are related to present-day plate-boundary interactions. Indicate whether the statement is true or false
A wind shift from east to south and an increase in temperature is indicative of the passage of:
a. a cold front. b. a warm front. c. an occluded front. d. None of these
Karst refers to landforms and landscapes dominated by ____
a. glaciers b. volcanoes c. oxidation d. solution
How do you make a proton out of a hydrogen atom?
A. let the hydrogen atoms undergo fusion B. remove a proton from a helium nucleus C. remove an electron from a hydrogen atom D. let the hydrogen atoms combine to form a hydrogen molecule and eject a proton E. let the hydrogen atoms combine to form a hydrogen molecule and eject an electron