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• What is Cambrian Explosion ?
• When did it occur
• Why did it occur ?
• How did it occur ?
• What changes happen after that ?
• Is it a mistery ?
Give full explaination with complete Details
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Answers
Answer:
●The Cambrian explosion or Cambrian radiation was an event approximately 541 million years ago in the Cambrian period when practically all major animal phyla started appearing in the fossil record. It lasted for about 13 – 25 million years and resulted in the divergence of most modern metazoan phyla.
●The Cambrian explosion, considered a crucial event in the evolution of animals, was in full burst by 518 million years ago. 'It's when most of the few dozen major animal body plans first appear in the fossil record and diversify,' explains Greg.
●The Cambrian Period marks an important point in the history of life on Earth; it is the time when most of the major groups of animals first appear in the fossil record. This event is sometimes called the "Cambrian Explosion," because of the relatively short time over which this diversity of forms appears.
●The Cambrian explosion or Cambrian radiation was an event approximately 541 million years ago in the Cambrian period when practically all major animal phyla started appearing in the fossil record. It lasted for about 13 – 25 million years and resulted in the divergence of most modern metazoan phyla.
Answer:
● What is Cambrian Explosion?
Answer:- Cambrian explosion, the unparalleled emergence of organisms between 541 million and approximately 530 million years ago at the beginning of the Cambrian Period. The event was characterized by the appearance of many of the major phyla (between 20 and 35) that make up modern animal life.
● When did it occur?
Answer:- 518 million years ago
The Cambrian explosion, considered a crucial event in the evolution of animals, was in full burst by 518 million years ago. 'It's when most of the few dozen major animal body plans first appear in the fossil record and diversify,' explains Greg.
● Why did it occur?
Answer:- Given the importance of oxygen for animals, researchers suspected that a sudden increase in the gas to near-modern levels in the ocean could have spurred the Cambrian explosion. ... This supported the idea of oxygen as a key trigger for the evolutionary explosion.
● How did it occur?
Answer:- Oxygen fluctuations stalled life on Earth.
Perhaps the strongest evidence to support the Cambrian evolutionary explosion of animal forms is the first clear appearance, in the Early Cambrian, of skeletal fossils representing members of many marine bilaterian animal phyla. ... A well-known taxonomic bias crept into studies of Cambrian and other early animal fossils.
● What changes happen after that ?
Answer:- Other major changes that occurred in the Early Cambrian (541 to 510 million years ago) include the development of animal species that burrowed into the sediments of the seafloor, rather than lying on top of it, and the evolution of the first carbonate reefs, which were built by spongelike animals called archaeocyathids ...
● Is it a mistery ?
Answer:- The age of the trilobites.
They're also known from their extensive fossil record. But their evolution is something of a mystery. At one point during the Cambrian Period, trilobites suddenly went from being soft-bodied animals to developing hard shells. And they were rapidly found in shallow seas all around the world.
● Give full explaination with complete Details :
Answer:- Uniqueness and Timing. The "Cambrian Explosion" refers to the sudden appearance in the fossil record of complex animals with mineralized skeletal remains. It may represent the most important evolutionary event in the history of life on Earth.
Explanation:
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