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Dr.Pentel conducts research to determine whether or not an after-school program improves school performance in fifth-grade children.Dr.Pentel is most likely engaged in _____.
Plant Sources
Organisms from the plant kingdom that provide resources for food, medicine, materials, and energy.
Animal Sources
Origin of products or substances derived from animals.
Lymph Node
A small, bean-shaped structure that is part of the lymphatic system, which helps the body fight infection and disease.
Cellular Damage
Harm that occurs at the cellular level, potentially leading to malfunction or diseases.
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