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killian killian
wrote...
Silver Member
Posts: 6024
10 years ago
What do we mean by a mass extinction?
A) The extinction of a large fraction of the world's plant and animal species in a relatively short period of time
B) The extinction of large animals, such as dinosaurs
C) An extinction caused by the impact of an asteroid or comet
D) The extinction of any species of plant or animal that has mass
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Answer accepted by topic starter
bio_manbio_man
wrote...
Educator
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Posts: 33243
9 years ago
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killian Author
wrote...
Silver Member
9 years ago
Thanks.
Smiling Face with Open Mouth
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