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Question generated: Spirogyra are green algae that can reproduce sexually. Which of the following features identifies reproduction in Spirogyra as sexual reproduction?

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Question generated: Rain forests contain more species of trees than any other biome. However, scientists have found that the soil of the forest floor is relatively nutrient poor. What could most likely account for this?

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Question generated: During which activity will light most likely be refracted?

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Question generated:
Jennifer and Mark prepared a layer cake using oil and water. After the cake baked in the oven, they added frosting. Which property could be measured with a balance?