1. It is a plastid, containing pigments such as xanthophyll (yellow in color) and carotene (orangish-red in color). These pigments impart color to flowers and fruits of plants.   Nucleolus   Chromoplast   Mitochondrion   Cell Wall   Hint Half-n-half Clue   2. It is the house of all metabolic activities and functions in the cell. In other words, it contains most of the cell organelles, each of which perform a specific function.   Chloroplast   Mitochondrion   Cytoplasm   Lysosome   Half-n-half Clue   3. It provides shape to the cell. It is semi-permeable, regulating the entry and exit of substances, namely solutes and ions.   Ribosome   Nuclear Membrane   Cell Membrane   Mitochondrion   Hint       4. It is semi-permeable, allowing substances to enter and leave the nucleus of the cell. It also provides protection to the nucleus of the cell.   Nuclear Membrane   Chloroplast   Endoplasmic Reticulum   Nucleoplasm   Half-n-half Clue   5. It provides protection, shape and rigidity to the cell. It is freely permeable, allowing substances in the form of solutions to enter and leave the cell without any hindrance.   Nucleolus   Cell Wall   Nucleoplasm   Nucleus   Hint       6. It initiates and regulates cell division. It also helps in forming spindle fibres, with the help of asters.   Chromoplast   Centrosome   Nuclear Membrane   Nucleoplasm   Half-n-half Clue   7. It performs intracellular digestion. It also helps in destroying foreign substances.   Chloroplast   Lysosome   Centrosome   Cell Membrane   Half-n-half Clue