A. Observation B. Research work C. Hypothesis D. Inductive Reasoning
A. Species B. Community C. Ecosystem D. Population
A. Biosphere B. Ecosystem C. Population D. Species
A. Chloroplast B. A Nerve Cell C. DNA D. Hydrogen
A. Organ B. Tissues C. Organelle D. Organ System
A. Biosphere B. Community C. Population System D. Ecosystem E. Species
A. Cells B. Organs C. Organ System D. Organelles
A. Unicellular structures B. Multi-cellular structures C. Sub-cellular structures D. Non-cellular structures
A. Cells B. Tissues C. Organs D. Organ System