How does the Cambrian explosion relate to evolution?

Their most common line is that the leap of evolution during the Cambrian involved too many changes too quickly, that the Cambrian therefore represents a gap in the fossil record best filled by a supernatural explanation.

How did the Cambrian Explosion affect evolution?

The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known. The Cambrian Explosion saw an incredible diversity of life emerge, including many major animal groups alive today. Among them were the chordates, to which vertebrates (animals with backbones) such as humans belong.

What does the Cambrian Explosion tell us about evolution?

This dissolved oxygen may have triggered the “Cambrian Explosion” — when most of the major groups of animals, especially those with hard shells, first appeared in the fossil record. Aldan River, Siberia,: This early Cambrian fauna tells us about the early evolution of animals with skeletons.

What is the Cambrian Explosion and how does it relate to both geologic and biological evolution?

The term “Cambrian explosion” refers to a hypothesized time when bilaterally symmetrical (bilaterian) animal groups of diverse forms diverged from a common ancestor during the early part of the Cambrian period, a geological period starting about 542 million years ago (Ma).

What is the evolutionary explosion Cambrian Explosion and what caused it?

They called this the Cambrian Explosion. Today, scientists have several theories to explain the phenomenon. One theory is that life may have been able to evolve quickly because the Earth had changed so much that it created enough new niches that species could rapidly fill them.

What does the Cambrian explosion represent quizlet?

1)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.

What theories explain the Cambrian explosion?

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.

What caused the Cambrian explosion quizlet?

What were the causes of the cambrian explosion? Mass extinction ediacaran fauna followed by an adaptive radiance.

What is the relationship between the Precambrian extinction and the Cambrian explosion?

3. What is the relationship between the Precambrian extinction and the Cambrian explosion? the Precambrian mass extinction was caused by A combination of climatic and geologic events. No matter what the cause, the extinction paved the way for a burst of new life called the cambrian explosion.

What development in animals created fossils that mark the Cambrian explosion?

What development in animals created fossils that mark the Cambrian explosion? Hard, mineralized skeletons. What is preserved in the Burgess Shale?

Why was the Cambrian explosion an important event in the evolution of life on the Earth quizlet?

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.

What adaptations appear in the fossils of the Cambrian explosion quizlet?

The Cambrian Explosion

  • Having much larger cell sizes.
  • Possessing a nucleus and organelles.
  • Being mostly aerobic.
  • Having cilia and flagella with tubulin rather than flagellin protein.
  • Having linear DNA molecules complexed with histones.
  • Commonly being multicellular.
  • Having both mitosis and meiosis.

What is the Cambrian explosion when did it occur and why is it significant quizlet?

The Cambrian explosion occured 541 mya and was a period of rapid diversification of animal forms. Most modern animal phyla are observed (around 30). Sudden appearance of complex animals with skeletons, most significant evolutionary event in Earth’s history.

What is the Cambrian explosion an example of quizlet?

The Cambrian Explosion represents the most animal phyla to appear in the marine fossil record during the Cambrian Period, 540-520 MYA. This is an example of adaptive radiation because the fossils show a huge accumulation of new characters in a relatively short period of time.

What was the Cambrian explosion quizlet geology?

What was the Cambrian Explosion? It was the sudden appearance (over a 10my period) of many different organisms, which occurred approx 540-548 mya.

What happened during the Cambrian explosion biology quizlet?

What happened during the Cambrian explosion? There was a rapid diversification of animal forms. There was a large asteroid impact. Animals first evolved from single-celled organisms.

What do we mean by the Cambrian explosion How long did it last and in what sense was it an explosion quizlet?

What was the Cambrian explosion and how long did it last for? The sudden appearance of many different animals. 10 million years.

What was special about Tiktaalik?

Its extraordinary blend of gills, scales, fins and lungs, combined with a movable neck, sturdy ribcage and crocodile-like head, placed Tiktaalik half way between fish and the earliest four-legged land animals.

What is true about the Cambrian explosion?

The Cambrian explosion marks the appearance of filter-feeding animals in the fossil record.