The bacteria in a pond is not an illustration of a single species on Earth.
What are bacteria?
They are the small and single-celled organisms. They are found in almost any part of the Earth and plays an essential part in the ecosystems of the planet. They are ubiquitous, and majority of them are free-living species usually comprising one biological cell.
Within a pond numerous species of bacteria are found. Some of the common bacterial species found in the ponds and the water sources are:
- Aeromonas hydrophila
- Pseudomonas species
- Bacillus species
- Enterobacter aerogenes
- Staphyloccus species
- Klebsiella pneumoniae
Thus, the correct answer is option A, that is, in a pond different species of bacteria are found.
Find out more information about bacterial species here:
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