Flowers, fruits and vegetables get different colours due to pigments present in chromoplasts. These pigments produce red, yellow or orange colours, making plant parts attractive.
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Yes, mature red blood cells in humans lack a nucleus. This helps them carry more oxygen. Some other specialised cells may also lose their nucleus to perform specific functions efficiently.
The cell membrane surrounds all cells and controls movement of substances. It is selectively permeable, allowing some materials to enter or leave, while protecting and maintaining the cell’s internal environment.
The cell interior contains cytoplasm, nucleus and organelles that work together. Each part performs specific functions, coordinating activities like energy production, transport and control, ensuring proper functioning of the cell.
Cutting equal-sized potato pieces and measuring initial weight ensures fair comparison. It helps observe accurate changes due to osmosis, avoiding errors caused by size or mass differences in the experiment results.