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Luda [366]
1 year ago
11

What marked the end of the precambrian period?

Biology
1 answer:
steposvetlana [31]1 year ago
5 0

Precambrian period ends at the first sign of complex life about 540 million years ago.  About 540 million years ago, the Precambrian age came to an end with the appearance of complex life.

<h3>What about Precambrian period?</h3>
  • The vast majority of earth's history occurs during the Precambrian period, which began with the planet's birth approximately 4.5 billion years ago and ended with the appearance of complex, multi-celled life forms nearly four billion years later.
  • The earth's surface at this time resembled traditional depictions of Hades: there were craters everywhere and oceans of liquid rock.
  • All across the place, volcanoes erupt, while asteroids and boulders continue to fall from orbit.
  • In the first great extinction, which occurred around 650 million years ago, 70% of the dominating Precambrian flora and animals perished.
  • Three major groups that have survived to the present day are represented in the fossil record of multi cellular organisms from the Precambrian.
  • These include sponges, cnidarians (such as corals, jellyfish, and sea anemones), and annelids, or segmented flatworms.

Learn more about Precambrian period here:

brainly.com/question/1146029

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