Why do rodents' teeth continue to grow? - Biology Stack Exchange
网页2013年8月29日 · The article "Dental Anatomy of Rabbits and Rodents" (Crossley et al. 2010) provides a basic review of rodent teeth, as there are over 1700 species. But, in general, the teeth are constant replaced due to abrasion. What the mechanism is for continual dental growth in rodents are, in part, discussed in the article "Tooth …
What happens to snakes that swallow rodents as a whole?
网页0. Owing to their narrow structure, no chewing mechanism nor limbs, a snake has to swallow its prey as a whole. In fact, their success and diversity is partly due to their ability to swallow prey relatively larger than their own body size. So inevitably, they need to process the parts like teeth, bones, exoskeleton and things of such nature.
Evolutionary distance between Canidae, Felidae, and Rodentia
网页2015年4月26日 · This means that cats and dogs have a more recent common ancestor than does either the cat or the dog with any rodent. Stated differently again, cats are not closer or further to rodents than dogs are. There is exactly the same distance between cats and rodents than between dogs and rodents. One onezoom, the carnivorans is presented as …
Why don't mammals have more than 4 limbs? - Biology Stack …
网页2014年9月30日 · Number of legs in terrestrial vertebrates. Not only do mammals have four legs but actually all terrestrial vertebrates (which include mammals) have four legs. There are slight exceptions though as some lineages have lost their legs. Typically snakes have no legs anymore. Apesteguia and Zaher (2006) discuss the evolution of snakes legs …
What is the evolutionary reason behind the fragility of teeth?
网页Note there are one group of mammals that does keep regrowing teeth, cetaceans have re-evolved polydont by giving up the differentiated heterodont complex teeth of other mammals, they have lost the genes entirely. So for mammals the choices are extremely simple endless teeth or a set number of different complex teeth.
Why do we have nerves in our teeth? - Biology Stack Exchange
网页2018年11月16日 · 10. Because your teeth evolved as a sensory organ. The material teeth are made of evolved first in placoderms, it existed to sense the electrical current in the water around it, so it has to form around a nerve. in modern animals the nerve mostly functions in sensing stress and thermal stress on the tooth. And because mammals are weird.
Hottest Questions This Month - Biology Stack Exchange
网页Q&A for biology researchers, academics, and students. Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to …
Which organs do cats not eat on their prey? - zoology
网页1. My cat brings us those too. So I guess it is very common to cats to not eat that part of a animal. My cat brings us one almost every morning so it is very common. This item they leave behind is called a gizzard. A gizzard is a part of the stomach that has strong acid in it so they know not to eat it. Share.
Why are we using upper teeth and lower lip on labiodental sounds?
网页2012年6月8日 · Articulating a dentolabial requires moving the jaw a fair distance forward, to go around the upper teeth before reaching the upper lip. As Ben pointed out in the comments, front-back jaw movement is unusual, a less "common movement in terms of other vocalisations and eating".
Hottest Questions Today - Biology Stack Exchange
网页Q&A for biology researchers, academics, and students. Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to …