Draw what the head of Dugesia looks like. Describe its eyespots, and contrast them with the eyes of another animal (yourself, a dog) with which you are familiar. Why do you think parasites like trematodes produce such large quantities of eggs?Why do tapeworms need such a complex scolex, but no mouth?

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the answer is d.) homologous; have mammary glands

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs