Human beings were present on Earth from the beginning of the Precambrian.
Question 10 answers
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: ... http://wiki.answers.com/Q/Special:Contributions&target=ip:ID1264317732
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The following are periods of the Paleozoic era, except:
Question 1 answers
New questions | New answers | ... the first period of the Paleozoic Era and of the Phanerozoic Eon. ... Ediacaran and Vendian. [ The Ediacaran Period overlaps, ... www.answers.com/topic/ediacaran
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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 OrdovicianWeegy:
We are now 95% of the way from the beginning of Earth's history ... largest known mass extinctions occurred at ... [ devastating Permian–Triassic extinction ... www.answers.com/topic/paleontology
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Which of these animal groups was NOT present by the end of the Cambrian?
Question 3 answers
CHORDATES was NOT present by the end of the Cambrian. [www.fossils-facts-and-finds.com/cambrian_period.html
]Expert answered|andrewpallarca|Points 18976|Note:
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