What animal has an internal structure that performs the sam task as a human skeleton

Mario performed an experiment to determine if photosynthesis was affected by the amount of light that a plant received. what could he have done to increase the validity of his data? reduce the number of plants. remove the 1 hour group. add a 0 hours control. measure the oxygen in liters

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

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