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What evidence suggests that vertebrates are more closely related to echinoderms than are any other invertebrate phyla?
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In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?
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Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?
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What evidence suggests that vertebrates are more closely related to echinoderms than are any other i...
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