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What rings did Rosa Mabel Lee study to understand fish growth?

Onion rings
Life rings in trees
Tire rings
Growth rings on fish scales

Answer

Fish growth rings are marks on fish scales that can reveal the fish's age and growth history. These marks are formed when the fish's growth slows down, such as during winter or when food is scarce. By studying these rings, scientists can learn a lot about a fish's life history, such as its age, growth rate, and the environmental conditions it has experienced.