Varani commodes are skilled hunters who can hunt down wild boar. Scientists have been finding out what their performance lies in.
The Varani commodes are majestic lizards who give a recall of the second-upper dinosaurs. They can remind Godzilla, a monster of movies and computer games.
The uniqueness of these varans, however, lies not only in their bodily parameters–they grow three feet and weigh one hundred and fifty kilograms–and in threatening appearance. As the new molecular-biological research has shown, Varans has developed a set of unique properties of blood, heart, vascular system, chemical receptors and metabolism. Some of them are approaching us, mammals.
About the time after the extinction of dinosaurs with disgusting pride, we speak as an “age of mammals”. In the background, there is an undisputed assumption that the mammals have validly replaced the “obsolete” receptors, who dominated the earth for most of the druho mountains. But in fact, we should talk about the tertiary and quaternary species as the age of mammals, birds and – scaly reptiles.
The last names are probably the most surprising of the three. But the truth is that snakes, lizards, and their close relatives have undergone tremendous development in their properties and number of species in the last tens of millions of years.
Two hundred varaních genes carry clear traces of advantage in natural selection. Among them, there are mainly genes specifying the functioning of the “cellular plants” of the mitochondria, cellular respiration, blood vessels, blood clotting, and defenses. It shows a few things.
The Varani have significantly developed the metabolism and circulatory system in their evolution, which independently confirms the former anatomical and physiological observations of their bodies. Thanks to these evolutionary innovations, the hunting behavior of these lizards is approaching more actively hunting mammals than passively luring reptilian.
Other genes that have been under the strong influence of natural selection fine-tune the blood clotting. It seems that by modifying these genes, or the proteins they produce, the Varans are not so prone to the effects of their own saliva, which, after the bite, prevents blood clotting and inducing a shock. A similar characteristic can be particularly important in the battles between males, who, thanks to this adaptation, do not directly endanger life.
The whole system is, on the other hand, tuned to avoid the risk of blood clots in the advanced vascular system of commodity-based Varans operating under greater pressure than other lizards.
Like the other evolutionary innovations of the commodities of the commodity, it proves that lizards in fertile environments do not have to play only secondary roles. At least in one case, they became active top predators comparable to mammals and birds.