Which statement about the geologic time scale is
incorrect?
a. Mammals originated early in the Mesozoic era.
b. Adaptive radiation of flowering plants, insects,
and birds took place during the Mesozoic era.
c. Mass extinction of the dinosaurs occurred about
65 million years ago.
d. Reptiles originated during the Paleozoic era.
e. Eukaryotes originated during the Proterozoic
eon.
Answer: b
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What will be an ideal response?
Which of the following is the correct structure of a nucleotide?
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