SG 25 The History of Life on Earth
Name: _________________
Overview and 25.1
Vocabulary
1.________________ Droplets with membranes that maintained an internal chemistry different
from that of their surroundings
2. ________________ RNA that can carry out enzyme like functions, even making
complementary copies of short pieces of RNA
3. _______________ The broad pattern of evolution above the species level
4. Discuss the lost worlds.
5. Discuss the conditions on early Earth that made the orgin of life possible.
6. Discuss the synthesis of organic compounds on early earth
7. Discuss the abiotic synthesis of macromolecules.
8. Discuss Protocells.
9. Discuss self-replicating RNA and the Dawn of Natural Selection.
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25.2
Vocabulary
1.____________________ The most common technique which is based on the decay of
radioactive isotopes
2. ___________________ The time required for 50% of the parent isotope to decay
3. Discuss the fossil record.
4. Discuss how rocks and fossils are dated.
5. Discuss the origin of new groups of organisms
25.3
Vocabulary
1._________________ Established because of the study of fossils, divided into 3 eons.
2. _________________ Hypothesis that supposes that mitochondria evolved before plastids
through a sequence of endosymbiotic events
3. _________________ Layered rocks that form when certain prokaryotes bind thin films of
sediment together
4. _________________ Phenomenon in which many present-day animal phyla appear suddenly
in fossils formed early in the Cambrian period
5. _________________ Posits that mitochondria and plastids were formerly small prokaryotes
that began living within larger cells
6. Discuss the geologic record.
7. Discuss the first single-celled organisms.
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8. Discuss photosynthesis and the oxygen revolution.
9. Discuss the first eukaryotes
10. Discuss the Origin of Multicellularity
11. Discuss the earliest multicellular eukaryotes.
12. Discuss the Cambrian Explosion.
13. Discuss the Colonization of land.
25.4
Vocabulary
1._________________ Large species become extinct throughout the Earth
2. _________________Periods of evolutionary change in which groups of organisms form many
new species whose adaptations allow them to fill different ecological roles or niches in their
communities
3. _________________Supercontinent formed by plate movements that brought all previously
separated landmasses together 250 million years ago
4. _________________The continents are part of great plates of Earth’s crust that essentially
float on the hot, underlying portion of the mantle
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5. Discuss how the rise and fall of groups of organisms reflect differences in speciation and
extinction rates.
6. Discuss plate tectonics.
7. Discuss consequences of continental drift.
8. Discuss mass Extinctions
9. Summarize the “Big Five” Mass Extinction Events.
10. Discuss the possiblility of the 6 Mass Extinction Event.
11. Discuss the consequences of Mass Extinctions.
12. Discuss Adaptive Radiations
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13. Discuss worldwide adaptive radiations.
14. Discuss Regional adaptive radiations
25.5
Vocabulary
1.__________________ An evolutionary change in the rate or timing of developmental events
2. __________________Master regulatory genes that determine such basic features such as
where a pair of wings and a pair of legs will develop
3. __________________ The sexually mature stage of a species may retain body features that
were juvenile structures in an ancestral species
4. Discuss effects of developmental genes.
5. Discuss changes in rate and timing.
6. Discuss changes in spatial pattern
7. Discuss the evolution of development
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8. Discuss changes in genes
9. Discuss changes in gene regulation.
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