Hierarchy of Life

Master the hierarchy of life! From atoms to ecosystems, this worksheet covers all levels of biological organization.

Match Match the Level of Organization with the correct description Atom The smallest unit of matter Molecules Two or more atoms joined together Organelles A membrane-bound structure in a cell that performs a special function Cells The smallest level of organization considered living Match Tissue a group of cells working together for the same function Organ A group of tissues working together for the same function Organ System A group of organs working together for the same function Organism Individual living thing Overlapping circles can be used to show relationships where each circle is made from the smaller circles inside it. In this diagram, levels of organization within living things are shown.If 3 is a cell, what does circle 5 stand for? Tissue Organism Organ Organelle Organ system Overlapping circles can be used to show relationships where each circle is made from the smaller circles inside it. In this diagram, levels of organization within living things are shown.If 3 is a leaf, what does circle 1 stand for? Xylem (different specialized cells working together) Carbon dioxide Shoot system (stem, leaves, flowers) Chloroplast Palisade mesophyll cell Analogy Compare the hierarchy of life with a book. If a book is an organism, what level would each of the following represent? book organism paragraph tissue letter organic molecules sentence cell page organ word cell organelles chapter organ system Categorize all of the statements as true or false TRUE Organisms are made of many body systems. Organisms are bigger than organelles. An example of an organ is liver breaking down fats during digestion. An example of an organ system is brain and spinal cord working together to help all part of the body communicate with each other. An example of a tissue is three different cell types within the phloem working together to transport sugar away from the leaf. FALSE Cells are made of tissues. Molecules are bigger than organelles. An example of an organelle is a guard cell opening and closing the stomata for gas exchange. An example of a macromolecule is a nucleus directing cell's activities. Tissues are made of organs. An example of a cell is an enzyme helping speed up a chemical reaction. Label the diagram below. 1. atom2. molecule3. cell4. tissue5. organ6. organ system7. organism8. population9. community10. ecosystem11. biosphere Match Population A group of individuals of ONE species living in a specific area at a given time Community ALL the living a things in a specific area Biome A large region of Earth that has a certain climate and certain types of living things Ecosystem A large community of biotic factors (plants, animals, microbes) and abiotic factors (light, climate, rocks) in a particular area. Biosphere The layer of the planet Earth where life exists