5 Questions
What is the estimated number of living animal species as of 2022?
2.16 million
Which clade includes animals with a bilaterally symmetric body plan?
Bilateria
During which geological period did the Cambrian explosion begin?
539 million years ago
Which group contains animals such as nematodes, arthropods, flatworms, annelids, and molluscs?
Protostomes
What is the size range of animals mentioned in the text?
From 8.5 micrometres to 33.6 metres
Test your knowledge of the animal kingdom with this quiz! Explore the diversity of animal species, their characteristics, and unique traits. From mammals to insects, challenge yourself with questions about the fascinating world of animals.
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