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What is the estimated number of living animal species as of 2022?
What is the estimated number of living animal species as of 2022?
What is the clade that most living animal species belong to?
What is the clade that most living animal species belong to?
What is the range of animal lengths mentioned in the text?
What is the range of animal lengths mentioned in the text?
What is the scientific study of animals known as?
What is the scientific study of animals known as?
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During embryonic development, animals grow from a hollow sphere of cells called:
During embryonic development, animals grow from a hollow sphere of cells called:
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