Penicillin and many other antibiotics are b-lactams. What is the composition of the b-lactam ring?

A) 1 carbon atom and 3 nitrogen atoms
B) 2 carbon atoms and two nitrogen atoms with the carbon atoms adjacent
C) an alternating sequence of 2 carbon atoms and two nitrogen atoms
D) 3 carbon atoms and one nitrogen atom


D

Environmental & Atmospheric Sciences

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Which occurs last?

A) fully developed warm front B) cut-off cyclone C) occluded cyclone D) open wave E) fully developed cold front

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If a species of frogs becomes threatened because they can only live in a narrow range of temperatures, they would be classified as a(n) ____________________

Fill in the blanks with correct word

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Compared to the amount of electric current in the filament of a lamp, the amount of current in the connecting wire is

A. often less. B. definitely less. C. the same. D. actually more.

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Carbon capture and storage (CCS) involves restoring degraded wetlands so that they will absorb massive amounts of carbon from the atmosphere

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences