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Questions and Answers
What distinguishes bilaterians from sponges?
What distinguishes bilaterians from sponges?
- Formation of a gastrula during early development
- Presence of well-defined tissues (correct)
- Presence of bilateral symmetry
- Development from three germ layers
What is a characteristic feature of most vertebrates?
What is a characteristic feature of most vertebrates?
- Development from only one germ layer
- Absence of a bony cranium
- Possession of a vertebral column (correct)
- Presence of radial symmetry
When did animals first evolve according to the text?
When did animals first evolve according to the text?
- 100 million years ago
- 600 million years ago (correct)
- 200 million years ago
- 1 billion years ago
What differentiates cnidarians from sponges?
What differentiates cnidarians from sponges?
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What is a defining characteristic of protostomes and deuterostomes?
What is a defining characteristic of protostomes and deuterostomes?
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Which phylum contains jellyfish and sea anemones according to the text?
Which phylum contains jellyfish and sea anemones according to the text?
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What type of symmetry do sponges typically display?
What type of symmetry do sponges typically display?
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Why is cephalization considered an adaptation for locomotion?
Why is cephalization considered an adaptation for locomotion?
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What distinguishes animals showing bilateral symmetry?
What distinguishes animals showing bilateral symmetry?
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How does radial symmetry benefit animals like jellyfish and sea anemones?
How does radial symmetry benefit animals like jellyfish and sea anemones?
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What is the significance of having sensory organs near the brain due to cephalization?
What is the significance of having sensory organs near the brain due to cephalization?
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Why do crabs and alligators possess complex organs specialized for various functions?
Why do crabs and alligators possess complex organs specialized for various functions?
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