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| 1. |
95. The gas used to extinguish fire is (a) Neon (b) Nitrogen (c) Carbon dioxide (d) Carbon monoxide Answer : (d) Carbon monoxide. |
| Answer» BOUND externally by a cell MEMBRANE. Usually MICROSCOPIC in size, cells are the SMALLEST structural units of living matter and compose all living things. Most cells have ONE or more nuclei and other organelles that carry out a variety of tasks. | |