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Questions and Answers
What is the clade that most living animal species belong to, which has a bilaterally symmetric body plan?
Bilateria
What is the estimated number of living animal species as of 2022?
7.77 million
What are the two characteristics that animals must possess according to the text?
consume organic material, breathe oxygen
What is the scientific study of animals known as?
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What is the name of the hollow sphere of cells from which animals grow during embryonic development?
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Study Notes
Characteristics of Animals
- The majority of living animal species belong to the Bilateria clade, characterized by a bilaterally symmetric body plan.
Animal Diversity
- As of 2022, there are an estimated number of living animal species.
Defining Characteristics of Animals
- Animals must possess two fundamental characteristics:
- They are multicellular organisms.
- They are heterotrophic, meaning they obtain energy by consuming other organisms or organic matter.
Study of Animals
- The scientific study of animals is known as Zoology.
Embryonic Development
- Animals grow from a blastula, a hollow sphere of cells, during embryonic development.
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Description
Test your knowledge of the diverse animal kingdom with this quiz! Explore different species, their characteristics, and unique traits as you answer questions about the fascinating world of animals.
