The negative shift in carbon isotope ratios at the Triassic-Jurassic boundary likely means that
A) climate was stable, so climate change is not a factor.
B) methane hydrates were melting.
C) phytoplankton became less productive.
D) bacterial respiration rates remained steady.
Correct Answer:
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Q29: The first negative feedback from global warming
Q30: The sharp decline in levels of carbon
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