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Questions and Answers
What is the estimated number of living animal species as of 2022?
What is the estimated number of living animal species as of 2022?
- 2.16 million
- 7.77 million (correct)
- 85,000
- 1.05 million
Which clade do most living animal species belong to?
Which clade do most living animal species belong to?
- Protostomes
- Bilateria (correct)
- Deuterostomes
- Echinoderms
What is the body plan of members in the clade Bilateria?
What is the body plan of members in the clade Bilateria?
- Radially symmetric
- Asymmetric
- Spherically symmetric
- Bilaterally symmetric (correct)
When did the Cambrian explosion, which saw the establishment of many modern animal phyla, begin?
When did the Cambrian explosion, which saw the establishment of many modern animal phyla, begin?
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What is the biological kingdom of animals?
What is the biological kingdom of animals?
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