Question

Q. Which of the following best describes the term "Cambrian Explosion”?

• A. The sudden disappearance of dinosaur species on the earth.
• B. The sudden appearance of dinosaur species on the earth.
• C. The appearance of modern animal phyla on the earth.
• D. The sudden appearance of microorganisms on the earth.

Answer 1

The correct option is C The appearance of modern animal phyla on the earth.

Explanation:

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. The beginning of the explosion is considered to be 541 million years ago during the Cambrian period. It resulted in the appearance of almost all modern animal phyla.