The number of mitochondria per cell varies widely; for example, in humans, erythrocytes (red blood cells) do not contain any mitochondria, whereas liver cells and muscle cells may contain hundreds or even thousands. The only eukaryotic organism known to lack mitochondria is the oxymonad Monocercomonoides species.
Explanation:
As shown in the illustration the highest percentage of air is composed of nitrogen gas at 78%. The second highest percentage is oxygen at 21%. The other trace gases, including carbon dioxide, make up about 1% of the gas composition.
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Answer:
aceptable value is directly accessed where as experimental value is not coinfermed.
5. System level
6. Organ level