A bacteria basically, smaller than a eukaryotic cell, can't be animal or plant cell and is less complex
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The answer is <span>Mutations.
</span>Mutation are the alteration of a nucleotide
sequence in DNA. By changing a DNA sequence, the mutations produce new sequences, and consequently the mutations add genetic variation. On the other hand, natural selection takes them away. Genetic drift and migration decrease genetic variation because of the random sampling and migrating of only some individuals, respectively. Likewise, in the <span>Hardy-Weinberg conditions there must be no mutations.</span>
Their mitochondria do not have an electron trasnport chain and so cannot funciton in aerobic respiration.
Electron Transport Chain (ETC) essentially makes the energy required for respiration.
Hope this helps
