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Human beings were present on Earth from the beginning of the Precambrian. Question 10 answers True False
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Asked 1/28/2013 5:56:55 PM
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User: Human beings were present on Earth from the beginning of the Precambrian. Question 10 answers True False

Weegy: Wrote the first answer to Is it true that mitochondria and chloroplasts are ... [ Human beings were present on Earth from the beginning of the Precambrian: False. In: ... ]


User: The following are periods of the Paleozoic era, except: Question 1 answers Vendian Cambrian Permian Ordovician

Weegy: New questions | New answers | ... the first period of the Paleozoic Era and of the Phanerozoic Eon. ... Ediacaran and Vendian. [ The Ediacaran Period overlaps, ... ]


User: The largest, most devastating mass extinction in Earth’s history occurred: Question 2 answers at the beginning of the Permian in the middle of the Cambrian at the end of the Permian at the end of the Ordovician

Weegy: We are now 95% of the way from the beginning of Earth's history ... largest known mass extinctions occurred at ... [ devastating Permian–Triassic extinction ... ]


User: Which of these animal groups was NOT present by the end of the Cambrian? Question 3 answers bryozoans arthropods chordates mollusks

Weegy: CHORDATES was NOT present by the end of the Cambrian.
Expert answered|andrewpallarca|Points 18976|



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Weegy: The gametophyte is the diploid part of the plant life cycle....False (More)
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Weegy: TRUE. Separate male and female gametophytes are produced in plants with a homosporous life cycle. (More)
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