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Across 2. The location of a cell's chromosomes 4. The rigid external coat that protects and supports plant cells 6. The site of energy release by respiration 8. The fluid-filled cavity found in plant cells that stores water and nutrients

Down 1. The partially-permeable barrier that regulates substances entering and leaving a cell 3. The site of photosynthesis in plant cells 5. The jelly-like material in which all a cell's organelles are found, and in which most cellular processes and reations occur 7. The site of protein synthesis