In your cells, cellular respiration happens in a special organelle called the mitochondrion. But as mentioned, prokaryotic organisms don't have organelles. Rather than taking place in the mitochondrion, cellular respiration happens either in the cytoplasm or across the plasma membrane of the cell.
Brain size has increased nearly 3x in 4 million years.
The symbol Al+3 is a cation. Therefore giving us the correct answer being option B. cation.
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The answer to this would be C.
As children grow, they gain more cells due to multiplication.