Petrifaction means turning to mud. dust. stone. mold. 1 points question 2 developed the concept of half-life. ernest rutherford leonardo da vinci james hutton none of the above 1 points question 3 which of the following is an isotope pair used to determine the age of rocks? uranium-lead rubidium-strontium potassium-argon all of the above 1 points question 4 what do periods make up? epochs eras eons none of the above 1 points question 5 which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above 1 points question 6 which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above 1 points question 7 which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic 1 points question 8 a. i. oparin hypothesized that cellular life was preceded by a period of volcanic eruptions. chemical evolution. extinction. none of the above 1 points question 9 systems have a membrane that separates the internal chemicals from the external chemical environment. living chemical both a and b none of the above 1 points question 10 during which period did the presence of stromatolites decline? cambrian proterozoic jurrasic cretaceous 1 points question 11 what did all known proterozoic animal fossils not have? shells dna both a and b none of the above 1 points question 12 do not have a nucleus and membrane-bound organelles. prokaryotes eukaryotes both a and b none of the above 1 points question 13 which of the following is a main type of vertebrate? reptile fish mammals all of the above 1 points question 14 which of the following is a period in the paleozoic era? devonian cambrian permian all of the above 1 points question 15 the first evolved during the ordovician period. mammals fish reptiles none of the above