Upon hearing some say that mammals are more advanced than lizards, I would immediately start thinking about biodiversity. Lizards are classified as reptiles and just as mammals; they have equally undergone unique evolution over time (Naish & Barrett, 2016). Both type of species have evolved and developed in their own unique places within their ecosystems. Moreover, no one species of any kind, be it mammals or lizards, have become better and more advanced than the other.
Lizards have developed more complex hearts than mammals. The function of these hearts is oxygen conservation. Lizards have tails, which are far more versatile compared to those of mammals. Lizards have brady metabolism, which enables them to attain a wider range of body sizes. This is enough proof that today’s lizards are just as advanced as today’s mammals.
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The discussion in the article, "Hot-Blooded or Cold-Blooded"? boils down to the need to understand thermoregulation. Over time, both mammals and lizards have adapted to the changing environments, though in different ways (Bennett & Johnston, 2008). In this context, our class readings help explain the difference between mammals and lizards. Mammals are endothermic creatures with a unique ability to produce heat internally. On the other hand, lizards are ectothermic species, which means they depend on the external environment to maintain their body temperature (Henderson et al. 2010).
To decide the most advanced and the best form of temperature regulation, the evidence of the Dinosaur story as detailed in the "Hot-Blooded or Cold-Blooded"? The article suggests that correlations like maximum locomotion rate and metabolic rate, to the upright position are the determining factors. Sadly, the biggest problem with this theory is that dinosaurs have not only been extinct for the longest time but also the psychology of animals can drastically change.
References
Bennett, A. F., & Johnston, I. A. (2008). Animals and temperature: Phenotypic and evolutionary adaptation . Cambridge [England: Cambridge University Press.
Henderson, C. L., Adams, S., & Hallwachs, W. (2010). Mammals, amphibians, and reptiles of Costa Rica: A field guide . Austin: University of Texas Press.
Naish, D., & Barrett, P. M. (2016). Dinosaurs: How they lived and evolved . Washington, DC: Smithsonian Books.
