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Snails and beetles have exoskeletons. Hypothesize the advantages and disadvantages of having an exoskeleton rather than a backbone. Explain your answer in one or two sentences
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Advantages of having an exoskeleton include protection from predators and the ability to adapt to different environments. Disadvantages include limited growth potential, reduced flexibility, and vulnerability during molting periods.
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Vertebrates include fish, amphibians, reptiles, birds, and mammals. Analyze the common characteristics of reptiles and explain how they differ from mammals. Explain your answer in one or two sentences
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Common characteristics of reptiles include cold-bloodedness, scaly skin, and laying eggs. Reptiles differ from mammals in that they lack mammary glands, have a three-chambered heart, and generally lay shelled eggs on land rather than giving birth to live young.
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