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Comparison of small subunit rRNA gene sequences from three eukaryotes and three bacterial species
The small dorsal fin of this blue whale is just visible on the far left.
Volvulus. A length of small intestine has twisted around itself, cutting off blood circulation to th
Varicosis. (a) Varicose veins develop due to the failure of valves in the superficial veins of the l
Primates in the New World tend to be small-bodied compared to those elsewhere.
Although average brain size increases gradually though time in H. erectus, individuals with small br