If the bond angle at a carbon atom is 180°, how many groups are distributed around the carbon atom?
A) 1
B) 2
C) 3
D) 4
B
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Unconformities which represent a break in the geologic record of deposition are important because ________
A) the fossils found in the unconformities can be used to correlate global time period B) they give an indication of sea level rise within an ocean basin C) they cannot be mapped D) they represent a period of major activity
Photochemical smog is characteristic of urban areas with many vehicles and a climate that is
a. cool, wet, and cloudy b. cool, dry, and sunny c. warm, dry, and sunny d. warm, wet, and cloudy e. warm, wet, and sunny
The Carboniferous flora in coal-forming swamps was dominated by ____________________ plants. Fill in the blank(s) with the appropriate word(s)