Question
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Q
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Activity 2: Arrange the following events from earliest to latest time
period. Write letters A to O to indicate the sequence and distinguish also the
eon and era in each item.
_1. Origin of many primate groups including apes.
2. Diversification of early vascular plants.
3. Oldest fossils of cells (prokaryotes) appear.
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_4. Origin of the genus Homo.
5. Cone-bearing plants continue as dominant plants, dinosaurs abundant
and diverse.
6. Marine algae abundant colonization of land by diverse fungi, plants,
and animals.
7. Plowering plants appear and diversify.
_8. First tetrapods and insects appear.
9. Ice age; humans appear.
10. Concentration of atmospheric oxygen begins to increase.
_11. Historical time; latest events of the earth are happening
12. Cone-bearing plants (gymnosperms) dominate landscape; first
mammal appear.
13. Continued radiation of mammal and angiospermns.
14. Amphibians became dominant.
Answer
3. Oldest fossils of cells (prokaryotes) appear. (Archean Eon)
8. First tetrapods and insects appear. (Devonian Period)
2. Diversification of early vascular plants. (Silurian Period)
6. Marine algae abundant colonization of land by diverse fungi, plants, and animals. (Ordovician Period)
12. Cone-bearing plants (gymnosperms) dominate landscape; first mammal appear. (Permian Period)
5. Cone-bearing plants continue as dominant plants, dinosaurs abundant and diverse. (Jurassic Period)
4. Origin of the genus Homo. (Pliocene Epoch)
7. Flowering plants appear and diversify. (Cretaceous Period)
10. Concentration of atmospheric oxygen begins to increase. (Proterozoic Eon)
9. Ice age; humans appear. (Pleistocene Epoch)
13. Continued radiation of mammal and angiosperms. (Cenozoic Era)
14. Amphibians became dominant. (Carboniferous Period)
1. Origin of many primate groups including apes. (Paleogene Period)
11. Historical time; latest events of the earth are happening. (Holocene Epoch)