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Q: The geologic time scale is divided by major changes in the fossil record. True False
A: Sir/Madam, The answer is "True"
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User: The geologic time scale is divided by major changes in the fossil record. True False

Weegy: Sir/Madam, The answer is "True"
beboythewizkid|Points 2048|

User: Select all of the answers that apply. Why do some people argue that the Cenozoic era should not be called the "Age of Mammals"? There are no mammals present during this era. Flowering plants are just as common during this era. Insects are equally as abundant during this era. Birds are just as widespread as mammals during this era

Weegy: Flowering plants are just as common during this era.
MoStWaNteD|Points 2641|

User: Select all of the answers that apply. Which of the following events define the Proterozoic eon? eukaryotic cells first seen stable continents first bacterial fossils Cambrian explosion oxygen builds up in atmosphere

Weegy: explosion oxygen builds up in atmosphere/The later of the two divisions of the Precambrian Eon, from about 2.5 billion to 540 million years ago. [ The Proterozoic was characterized by the formation of stable continents, the appearance of abundant bacteria and archaea, and the buildup of oxygen in the atmosphere. By about 1.8 billion years ago the oxygen buildup was significant enough to cause many types of bacteria to die out. At this time eukaryotes, including multicellular algae and the first animals, first appear in the fossil record. (Earth Sciences / Geological Science) the later of two divisions of the Precambrian era, during which the earliest plants and animals are assumed to have lived Compare Archaeozoic adj (Earth Sciences / Geological Science) of or formed in the late Precambrian era ]
Controler|Points 3816|

User: largest mass extinction in Earth's history

Weegy: Permian?Triassic extinction event (End Permian)
theresearcher|Points 2086|

User: toxic atmosphere; first bacteria

Weegy: Bacteria are a large domain of single-celled, prokaryote microorganisms.
feurem|Points 1965|

User: Hadean eon largest mass extinction in Earth's history 2. Archean eon toxic atmosphere; first bacteria 3. Proterozoic eon time of the dinosaurs 4. Phanerozoic eon sometimes called "Age of Mammals" 5. Paleozoic era buildup of oxygen; first eukaryotes 6. Mesozoic era formation of the solar system 7. Cenozoic era current eon

Weegy: The first eon in Earth's history, the Hadean.
jasonharris161|Points 20|

User: Archean eon

User: Bryozoans are invertebrates, sometimes referred to as moss animals, that evolved before the Ordovician-Silurian extinction. True False Question #2MultipleChoice Score: Before the Ordovician-Silurian extinction, the diversity of life on Earth was growing enormously due to _____. shallow, warm, continental seasoverpopulation of land forestscold, glaciated oceansunknown reasonscomets hitting the earth Question #3Matching Score: Match each extinction to its appropriate characteristic. 1. Cretaceous-Tertiary possibly caused by forest grow on Earth's land surface 2. End Triassic killed off the dinosaurs 3. Permian-Triassic the earliest mass extinction on record 4. Late Devonian possibly caused by massive rifting of Earth's surface 5. Ordovician-Silurian worst mass extinction in Earth's history Question #4MultipleSelect Score: Select all of the answers that apply. What are the possible causes of the Late Devonian extinction? asteroid hitting the earthsea level changesoverpopulation of sea organismsgrowth of land forestsclimate changes Question #5MultipleChoice Score: An enormous rifting occurred, causing massive floods of basaltic lavas and the release of large amounts of gas. This is thought to have been the cause of which mass extinction? Cretaceous-TertiaryEnd TriassicPermian-TriassicLate DevonianOrdovician-Silurian Question #6MultipleSelect Score: Select all of the answers that apply. The Cretaceous-Tertiary extinction, the most famous of the Big Five, has been attributed to what major event(s) that triggered the extinction of the dinosaurs? a small asteroid hitting the earthmassive volcanoes erupting around the worldrapid growth of forests on land surfacesfalling sea levelsincreased competition from mammals Question #7MultipleChoice Score: The mass extinction that was most likely caused by the formation and retreat of glaciers was the _____ extinction. Cretaceous-TertiaryEnd TriassicPermian-TriassicLate DevonianOrdovician-Silurian

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Asked 1/10/2013 11:48:59 AM
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