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Earth’s biota were believed to be relative simple, slow-
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- Earth’s biota were believed to be relative simple, slow-metabolizing life. During what period is this?An 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 sequence of events accurately describes the history of the planet (from oldest to youngest)? Eukaryotes appear, Oxygen increases in the atmosphere, Prokaryotes appear, Oxygen increases in the atmosphere, Eukaryotes appear, Prokaryotes appear Prokaryotes appear, Oxygen increases in the atmosphere, Eukaryotes appear Prokaryotes appear, Eukaryotes appear, Oxygen increases in the atmosphere
- How do we know when oceans were first present on Earth?Why is the presence of oceans significant to the origins anddiversification of life?Which of the following describes the organisms and/or processes that were most influential in the creation of early Earth ecosystems? a. Extinction of animals and domination of plants b. Build up the greenhouse gas carbon dioxide c. Prokaryotic production of an oxygen rich environment d. Eukaryotic growthTrue or false. The supercontinent pangaea formed about four billion years ago.
- Life is found almost everywhere on Earth, but can you explain why it is notdistributed evenly around the planet.The most pivotal event in the history of life on Earth, allowing for the emergence of eukaryotic cells, was the _____________.What is the significance of the "Vernadsky Paradox" and the concept "that the earth is an energetically open, but materially closed system" from a microbial perspective
- Which of the following accurately describes the Hadeon Eon? Earth during the Hadeon Eon closely resembled the earth of today. Earth was extremely hot and molten in nature during the Hadeon Eon. Earth contains an oxygen-rich atmosphere that allows photosynthetic organisms to flourish. Life first appeared on Earth during the Hadeon Eon.In their laboratory experiments of simulations of early Earth, Miller and Urey observed the abiotic synthesis of abundant amounts of DNA amino acids liposomes genetic systems Which of the following was probably NOT present in the primitive Earth s atmosphere (when life first appeared)? O2 NH3 H2O CH4 CO2Which of the following is true? A) Life originated around volcanic vents deep in the oceans. B) Life originated in lakes. C) Life originated on meteors.