How did cyanobacteria aid the evolution of complex life on land? do you think cyanobacteria are as significant to this process today as
they were during precambrian time?
need asa its timed

answer:

,answer: cyanobacteria aid to evolution of complex life on land during precambrian time as it was the main source of oxygen at that time. they performed photosynthesis and produced oxygen that led to evolution of complex life forms on earth. this is because there are more sources of oxygen present today.

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

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