rod -saped areobic bacterium

write essay:

" "some scientists proposed that a rod-shaped aerobic bacterium might have evolved into the mitochondrion by living as a parasite inside a eukaryotic cell.disscus this statement."

Hint

1. the similarities between a rod-shaped aerobic bacterium and the mitochondrion

2.changes needed for the bacterium to evolve into a mitochondiron

Update:

please help me!!!!!!!!!!!!!!!!!!!!!!!!

1 Answer

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  • Kevin
    Lv 7
    8 years ago
    Favorite Answer

    Mention bacteria and nearly all of us assume them to be disease causing microbes. However, there is more than the harmful side of these tiny organisms. In fact, bacteria play a major role in the overall functioning of the ecosystem. Believe it or not, a major biomass of the earth is contributed by minute bacterial cells. Consequently, the variability of bacteria in terms of shape, size, dwelling place, feeding habit and surviving requirements is extremely vast.

    Bacteria are omnipresent, meaning that they are found in any type of environmental conditions. Some of the species are isolated from the least hospitable areas like hot springs, below earth's crust and radioactive wastes. So, you can imagine the adaptability of bacteria, as compared to other living entities. Based on whether oxygen is required for survival or not, they are classified as aerobic bacteria and anaerobic bacteria. Over here, we will take a look about aerobic bacteria definition and examples.

    By obligate aerobic bacteria, we mean those bacterial strains that require oxygen for their survival, growth and reproduction. In short, they need oxygen for cellular respiration. Contrary to this, there are anaerobic bacteria, which live in a non-oxygenated environment throughout their life. Intermediary to these two groups are facultative bacteria (e.g. E. coli, Staphylococcus) and microaerophilic bacteria (e.g. Campylobacter, Helicobacter pylori). The former type behaves both aerobically and anaerobically, according to the prevailing conditions. In case of microaerophilic type, they require oxygen, but in a very low concentration.

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