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- Scientists think that terrestrial life probably originated in Earth's oceans becauseChoose one: A. energy was available there. B. all of the chemical pieces were there. C. All of the possible answers are correct. D. the earliest evidence for life on Earth comes in ocean-dwelling forms.where on the earth did life mostly likely first emerge, where all the ingredients and conditions for life existed? a. volcanic islands b. deep oceanic vents c. tidal pools d. tropical rainforestWhich of the following was likely MOST important for life to begin existing on Earth? A. sunlight B. DNA C. a source of oxygen D. a source of energy
- A. What do scientists think the primitive Earth was like? Give 3 evidences. B. How could life possibly evolve in such an inhospitable environment?Which 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.Which of these steps probably occurred first in the chemical andbiological evolution of life?a. The cell membrane of a protobiont formed.b. The first organic molecules formed.c. The original genetic material was RNA.d. Simple organic monomers formed from inorganic materials.
- What event is thought to have contributed to the evolution of eukaryotes? a. global warming b. glaciation c. volcanic activity d. oxygenation of the atmosphereFigure 1.8 Which of the following statements is false? A. Tissues exist within organs which exist within organ systems. B. Communities exist within populations which exist within ecosystems. C. Organelles exist within cells which exist within tissues. D. Communities exist within ecosystems which exist in the biosphere.The Miller experiment consisted of various gases, believed to have been present in the early atmosphere of Earth, exposed to an electrical arc. This experiment resulted in a. nothing. b. carbon dioxide gas and water vapor. c. amino acids. d. rain.
- If the evolution of life was placed on a 24 hour clock, when did humans arrive? a. At the 30 minute mark. b. 1 minute into the beginning c. Less than 1 secong to do ( to the end) d. Right at the ver starthow would David Christian define the mini thresholds of life? a. times when a new and more complex life form appeared b. times when a new species appeared c. times when life emerged on a new planet d. times when new forms of reproduction emergedWhich of the following steps has not yet been accomplished byscientists studying the origin of life?(A) synthesis of small RNA polymers by ribozymes(B) formation of molecular aggregates with selectivelypermeable membranes(C) formation of protocells that use DNA to direct thepolymerization of amino acids(D) abiotic synthesis of organic molecules