2013年10月6日 · Modern mammals have long snouts because they inherited the trait from their earliest mammalian ancestors, such as Morganocodon. In turn Morganucodon and other early mammals had long snouts inherited from their synapsid ("reptilian") ancestors like the sphenacodontid (see the first phylogenetic tree below). Why did the synapsids have long …

2020年1月1日 · Of course an animal can try to balance a range of strategies and there are all kinds of specialized forms like saber teeth, venoms, ect. Of course this is also simplified a lot of other things effect snout length as well, things like climate (long snouts cause less heat/water loss through breathing), sense of smell, or even vision.

Ive found that the study of this feature, the nose is far from complete.Although we see the evolution of other mammals and their faces has a great deal to do with there ability to survive different enviornments I believe it , our snozz is a genetic mutation in which allows us the ability to go from nonaquatic to aquatic with out needing a snorkel. ?.by defying why we have this thing …

2015年6月10日 · They found that doing so results in premaxillary and palatine bones which resemble ancestral archosaurs. While incredibly interesting, this is a far cry from creating living chickens with dinosaur snouts. To somewhat answer your question, chickens do not contain all of the genes that dinosaurs once had. They will have both gained and lost ...

2017年2月28日 · Most mammalian males have nipples. The duck-billed platypus does not have nipples but you begin to see development of nipples in marsupials (Park and Lindberg 2004) like the opossum and kangaroo.

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I'm looking for a downloadable list of all known (or better said, online documented) species in this straightforward format, as an example the European Frog: Kingdom: Animalia Division: Chordata C...

What is the evolutionary reason behind sharing the same path for food and air? For example, we have a nose and lungs, yet they are linked by the pharynx, which is shared with the mouth and oesopha...

Well, technically yes, but most adult dolphins do not have hair:. Unlike most mammals, dolphins do not have hair, except for a few hairs around the tip of their rostrum (beak) which they lose shortly before or after birth.

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