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From Quantum Evolution (Johnjoe McFadden)
2. Are these not single celled organisms?
3. How common is this feature?
1. What biological feature of a bacteria allows it to 'see' or detect a given wavelength of light? What part of or feature of the cell detects light of a given wavelength?Many microbes, including photosynthetic bacteria, possesses the most rudimentary vision. These bacteria are able to swim towards bright light where their photosynthetic skills are most effectively deployed. They even have colour vision since they are able to concentrate where in the spectrum their chlorophyll absorbs the most light. Mutants can be isolated that lack this phototactic ability, demonstrating that the gene for some kind of photoreceptor is encoded in their DNA and thereby subject to mutation and natural selection.
2. Are these not single celled organisms?
3. How common is this feature?