During Precambrian Time, simple life forms existed in the oceans of Earth. This was followed, during the Paleozoic Era, by the "great ___________ explosion" when many new life forms appeared on Earth in a very short period of time.
Answers
Answer:
Explanation:The Cambrian explosion or Cambrian radiation was an event approximately 541 million years ago in the Cambrian period when most major animal phyla appeared in the fossil record. It lasted for about 20–25 million years and resulted in the divergence of most modern meta-zoan phyla. The term that fits the blank option is CAMBRIAN and this refers to the Great Cambrian Explosion or Radiation that occurred in some 541 million years ago which is already mentioned. This was considered as one of the most significant evolutionary event because it marked the appearance of the most major animal phyla.
During the Paleozoic era, the great Cambrian explosion or radiation occurred.
Explanation:
- A large number of new forms of life started appearing on Earth in a very small time period.
- This event happened approximately 541 million years ago on our planet.
- After this major event occurred, a wild and primary diversification of various other organisms accompanied.
- Before this event occurred, organisms were organized into colonies, had a single cell, and were of simple structure.
- All the animals we see today started appearing and evolving from this period.
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