Biology

Biology, 10.10.2019 03:30, makaylahamrick

What era is before and after the precambrian?

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Biology, 04.07.2019 03:00, irlanda20

Fossilized evidence of earth’s first forms of life would consist of? a.)prokaryotes from the precambrian b.)invertebrates from the precambrian c.)vertebrates from the precambrian d.)eukaryotes from the precambrian don’t guess you!

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Geography, 01.08.2019 17:10, Jsanders2276

The precambrian history of earth is difficult to determine for all of the following reasons except select one: o a. precambrian rock is exposed only on three continents o b. precambrian rock is complexly deformed o c. precambrian rock is metamorphosed o d. there is little stratified rock in the precambrian record o e. there are few useful index fossils in the precambrian record

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Biology, 24.09.2019 01:10, esnyderquintero

For many years, scientists believed that almost all animal lineages burst into being during the cambrian era (just after the end of the precambrian super eon). however, there have been many recent findings of animal-like fossils and "trace fossils" (fossils of an animal-like organism's movement) from the late precambrian. which of the following best explains why it took so long to realize there was animal-like life in the precambrian? a) animals from the late precambrian had soft bodies. b) there were many hard-shelled animals in the cambrian. c) the global climate was such that there was poor fossilization in the precambrian. d) there were very few animals during this period.

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Physics, 23.11.2019 13:31, bluebabyyy

Little is known about much of earth’s early history because a. precambrian rocks have been deeply buried b. precambrian rocks have been changed by heat and pressure c. precambrian soft-bodied life-forms weren’t often preserved as fossils d. all of the above

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