Which description best characterizes a mass extinction?
A.
The loss of a large number of spec...
Which description best characterizes a mass extinction?
A.
The loss of a large number of species within a relatively short time period
B.
The collection of Earth's known fossils, placed in order from earliest to latest
C.
The scientific explanation for changes observed in life on Earth
D.
The change in weather patterns on Earth, documented in the fossil record
Answers: 1
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Which of the following molecules could pass through the plasma membrane by simple diffusion? a. na+ ions b. glucose c. amino acids d. carbon dioxide
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