Given a scientific passage and an answer, generate a question for the given answer.
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Question: Passage: Graphs are very useful tools in science because they display data visually. Three commonly used types of graphs are bar graphs, circle graphs, and line graphs. Each type of graph is suitable for a different type of data. Answer: graphs

Answer: Bar, circle, and line are examples of what kind of data visualization?

Question: Passage: Protostomes and Deuterostomes Bilaterally symmetrical, triploblastic eucoelomates can be divided into two groups based on differences in their early embryonic development. Protostomes include phyla such as arthropods, mollusks, and annelids. Deuterostomes include. Answer: protostomes and deuterostomes

Answer: What are the two groups that tripoblastic eucoelomates can be divided into based on early embryonic development differences?

Question: Passage: Fish show great diversity in body size. They range in length from about 8 millimeters (0.3 inches) to 16 meters (about 53 feet). Most are ectothermic and covered with scales. Scales protect fish from predators and parasites and reduce friction with the water. Multiple, overlapping scales provide a flexible covering that allows fish to move easily while swimming. Answer: fish

Answer:
What broad category of animals is primarily ectothermic and covered with scales that facilitate swimming?