1. It is a plastid that is colored differently in different cells. It contains pigments such as xanthophyll (yellow in color) and carotene (orangish-red in color).   Hint First letter clue   2. It is a clear space filled with water or other substances in the form of solutions. It has a covering called tonoplast.   Hint       3. It has a double-walled structure. Its inner wall is produced into folds known as cristae. It is generally sausage-shaped.   First letter clue   4. It is chiefly composed of a dense fluid. It contains chromatin fibres, which are made up of DNA (Deoxyribonucleic acid).   First letter clue   5. It has numerous pores, making it semi-permeable. It is the covering of the nucleus of the cell.   First letter clue   6. It is a colorless plastid. It contains starch.   First letter clue   7. It consists of an irregular network of double-walled tubular membrane. It does not have ribosomes attached to it.   First letter clue