(1) As compared to metazoans, the development of these unicellular organisms is likely less affected by dissociated heterochrony, which is considered a common phenomenon in metazoans.

(2) In the heliocentric perspective, our dear earth is a mere speck in this expanding infinite space where a very tenacious life came into existence in its oceans about two and half billion years ago in a unicellular body - the Amoeba.

(3) An interesting variant of normal photosynthesis is the simultaneous photoevolution of molecular hydrogen and oxygen by certain unicellular algae and in vitro cell-free preparations.

(4) Second, the existence of unicellular life for one or two billion years without the formation of multicellular life wouldn't be a problem on Mars because it obviously was not a problem on Earth.

(5) All further cell divisions from this unicellular stage of the human being occur by simple mitosis.

(6) Although the evolution of well-mixed, unicellular microorganisms has been studied extensively, the evolution of filamentous microorganisms has not.

(7) However, the evolutionary distance between unicellular organisms and higher plants might be a serious setback when trying to obtain high expression, at the right time and cellular localization, of foreign genes in plants.