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- Which of the following was not present by the end of Precambrian? a. archaea c. fungi b. bacteria d. fishAn abundance of___________ in Earths early atmosphere would have prevented the spontaneous assembly of organic compounds on early Earth. a. hydrogen b. methane c. oxygen d. nitrogenWhich of the following shows the correct sequence of periods in the Mesozoic era: a) Triassic, Jurassic, Cretaceous b) Cretaceous, Jurassic, Triassic c) Jurassic, Cretaceous, Triassic d) Triassic, Cretaceous, Jurassic
- During which geologic eon was the Earth first colonized by living organisms? the Phanerozoic Eon the Proterozoic Eon the Archaean Eon the Hadean Eon none of the aboveOn the geologic time scale, life originated in the_____ . a. Archean c. Phanerozoic b. Proterozoic d. CambrianThe “age of fishes”, which began with the Cambrian Period (about 541 million years ago), and ended with the Permian/Triassic extinction event (about 252 million years ago), is also known as: the Mesozoic Era the “age of birds and mammals” the Cenozoic Era the “age of reptiles” the Paleozoic Era
- Which of the following geologic periods is not part of the Paleozoic Era? the Carboniferous Period the Cambrian Period the Cretaceous Period the Devonian Period the Ordovician PeriodGiven the life-style we live today, what pre-historic period gives us the ability to heat our homes, run our cars and have a comfortable life Group of answer choices Jurassic neogene carboniferous CambrianWhich of the following periods is the earliest during which animals may have appeared? a. Ordovician period b. Cambrian period c. Ediacaran period d. Cryogenian period
- The____ tool industry characterizes the Middle Paleolithic / Middle Stone Age and spans the time from____ - ____ years ago. a. Acheulean; 1 million - 500,000 b. Oldowan; 200,000 - 100,000 c. Mousterian; 300,000 - 40,000 d. Mousterian; 100,000 - 10,000Which of the following events did NOT occur during thePrecambrian?a. Formation of the ozone layerb. RNA worldc. Evolution of the first animalsd. Evolution of the first plantsDuring which part of the Cenozoic Era did glaciers cover mountains and large of amounts of ice form, causing the sea level to drop and allowing organisms to migrate to new areas? a toward the middle of the Mesozoic Era b at the beginning of the Tertiary Period c toward the end of the Tertiary Period d at the beginning of the Quaternary Period