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Prompt compare the three types of volcanic mountains in terms of shape, type of eruption, and the minerals that make up the volcano

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.