Circadian clocks are believed to have evolved in parallel with the geological history of the earth, and have since been fine-tuned under ...
Circadian clocks provide fitness advantage even to organisms living under constant conditions, such as those prevailing in the depth of oceans or ...
We do not know in what order the three groups broke with each other. At this time they were probably all still single-celled organisms.
The first living organisms we have proof of thanks to fossils, are three and a half ... so we can assume that life's evolution in the first two or three billion years was ...
Thus, understanding the evolutionary history of living species amounts to
At first, all living things on Earth were simple, single-celled organisms. Much later, the first multicellular organisms evolved, and after that, ...
Relationships and estimated divergence times of the living apes are shown.
proposed and, after much debate, widely accepted that eukaryotes emerged as a result of a sequence of endosymbiosis between prokaryotes.
In this way, the organic remains of living things are fossilized (changed into stone ), creating the evidence of ancient life studied by scientists. Because of the order ...
... is the adjustment of organisms to their environment in order to improve their