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.(2 points)

Answer 1

Advantages of having an exoskeleton are that it provides protection from predators, support, and prevents water loss while disadvantage include limited growth and movement restrictions.

Answer 2

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.

Answer 3

Common characteristics of reptiles include dry, scaly skin, laying eggs with soft shells, and being ectothermic. Reptiles are different from mammals in that they have a single circulatory loop, lungs with few internal divisions, and lack hair or fur.