Key Concept: Organelles build cells, cells form tissues, tissues form organs, and organs work in systems.
Section A: Order and Definitions
1. Put these levels in order: organs, cells, organelles, tissues, systems. [5]
2. Define tissue and organ. [2]
Section B: Examples
3. Give one example for each level: tissue, organ, and system. [3]
4. Explain why multicellular organisms need organ systems. [2]
5. Identify the levels in this sequence: palisade cell, leaf, photosynthetic tissue, chloroplast, plant. [4]
Total marks: 16
Mark Scheme
1. Organelles -> cells -> tissues -> organs -> systems [5]
2. Tissue: group of similar cells with a function; Organ: group of tissues working together [2]
3. Any correct examples, e.g. muscle tissue, heart, circulatory system [3]
4. Systems allow specialised organs to coordinate functions and meet the needs of the whole organism [2]
5. Chloroplast = organelle, palisade cell = cell, photosynthetic tissue = tissue, leaf = organ, plant = organism/system level [4]