The brain of the cell most important
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Answer:
Describe the features that characterized the earliest animals and when they appeared on earth
Explain the significance of the Cambrian period for animal evolution and the changes in animal diversity that took place during that time
Describe some of the unresolved questions surrounding the Cambrian explosion
Discuss the implications of mass animal extinctions that have occurred in evolutionary history
Answer:
A} the sun
Explanation:
The sun is the greatest and heavier then the other planet