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22 September, 14:55

1. Which of the following appeared on Earth most recently?

a. chordates

b. tetrapods

c. dinosaurs

d. single-gene algae

2. Dinosaurs appeared before

a. mammals

b. photosynthesis

c. chordates

d. land plants

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Answers (1)
  1. 22 September, 17:23
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    2. Dinosaurs appeared before mammals (a)
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