History

History, 16.10.2019 03:00, minnie7760

Which of the following provides key evidence that 3.5-billion-year-old stromatolites indicate the presence of life on earth at that time? which of the following provides key evidence that 3.5-billion-year-old stromatolites indicate the presence of life on earth at that time? microfossils found within stromatolites that appear to be individual fossilized microbes the layered structure of the stromatolites because layering can be produced only by life the similarity in structure between the stromatolites and bacterial mats that still live today the presence of living bacteria in stromatolites.

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Biology, 22.06.2019 16:30, kalebbenton15

The earth formed roughly 4.5 billion years ago, yet evidence of life dates back to about 3.5 billion years ago. which one is not a possible hypothesis of how life on earth arose?

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Geography, 10.10.2019 02:10, nakeytrag

Igure s.22, page 25 1 is sphern also possible that life originated in hot springs similar t those found in yellowstone national park 1.5 billion years ago, that dramatically transfo our planet. fossil evidence for the existence of t scopic bact stromatolites, composed of slimy material se ie eme back smal as eria includes distinctively layenedd mats, called earth's first life: prokaryotes regardless of where or how life originated, it is clear that what the journey from "then' to now involved change (figure from the stuly of modern stromatolites like those four canisms, along with trapped sediments (figure 2221 wn abont these an cient fossils comes mainly 22 20. the first known organisms were simple single-cell l shak bas anstrai ure 221a) to s stromatolites ear the figu lke stubby pillins bi eye on earth 22.2 enal ing t he rocks shown here are cambrian-age stromatolites of the hoyt limestone, exposed at lester park, near saratoga springs, new york lant that 22.2 se question 1 using figure 22.3, determine approximately how many years ago these rocks were deposited question 2 what is the name of the group of organisms that likely produced these limestone deposits? question 3 what was the environment like in this part of new york when these rocks were deposited? leng in p

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Biology, 20.10.2019 16:30, Lashuante4722

Stromatolites (pictured here) are rocky structures that generally form in shallow waters from the binding of sediment by microbial biofilms. stromatolites are typically hypothesized to be formed from the presence of cells that bind these grains together. if the appearance of the stromatolites in the fossil record were to indicate the emergence of life on earth, which cell types would most likely be responsible for their formation? a) prokaryotic cells b) eukaryotic yeast cells c) eukaryotic plant cells d) eukaryotic animal cells

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Biology, 09.12.2019 03:31, ramose7021

Stromatolites are rocky structures that generally form in shallow waters from the binding of sediment by microbial biofilms. stromatolites are typically hypothesized to be formed from the presence of cells that bind these grains together. if the appearance of the stromatolites in the fossil record were to indicate the emergence of life on earth, approximately how old are the oldest stromatolites on earth? a) 2.6 billion years old b) 3.6 billion years old c) 4.6 billion years old d) 400 million years old

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