Questions and Answers
What is the estimated number of extant animal species?
10 million
Where did animal evolution begin?
In the ocean
What is the primary challenge scientists face in classifying animals?
Identifying traits common to all animals
Which group is NOT easily classified as animals?
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What distinguishes animals in terms of complexity?
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When was the leaf chameleon (Brookesia micra) discovered?
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What distinguishes animals from autotrophic organisms?
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What characteristic distinguishes animals in terms of energy derivation?
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How do animals differ from plants and fungi in terms of cellular structure?
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What is a key characteristic of animal tissues that allows for coordination of motility?
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Which feature is unique to animal tissue structure compared to fungi and plants?
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Why are animals considered motile organisms?
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