Do snakes have bones like mammals? The truth is, snakes only have fewer different types of bones compared to animals such as mammals, but what bones they have are great in number. The number of bones a snake has depends on how big it is. A short-bodied viper such as the puff adder ...
Galis F. Why do almost all mammals have seven cervical vertebrae? Develop- mental constraints, Hox genes, and cancer. J Exp Zool 1999;285:19 -26Galis, F., 1999. Why do almost all mammals have seven cervical vertebrae? Developmental constraints, Hox genes, and cancer. J. Exp. Zool. ...
How many mammals have backbones? Believe it or not,most animals don't have backbones-- mammals are one of the few groups that do. All mammals, except some sea cows and sloths have seven bones in their necks. This includes giraffes who have VERY long spines! Their necks can be 6 1/...
Dog owners are very serious about these events, as they’ve worked so hard for a long time, and to have everything ruined by a dog in heat can be frustrating. If you do attend these events and estrus occurs unexpectedly, remove your dog from the premises immediately. The event coordinator...
In recent years, some students sitting for the gaokao, which plays an important part in deciding which college they will successfully get into, have been known to use headphones connected to their telephones to get help from outside. In the early part of this century, machines screened all te...
No, the gills of juvenile amphibians do not have bones. In fact, juvenile amphibians do not have any bones at all. The skull of tadpoles and other...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your ...
Do all mammals have vertebrates? Mammals are vertebrates, which means that theyall have backbones (spines). Believe it or not, most animals don't have backbones -- mammals are one of the few groups that do. All mammals, except some sea cows and sloths have seven bones in their necks....
Of around 70 species of whales, more than 50 have teeth instead of baleen. Killer whales are one of them. Killer whale teeth are made up of dentin or ivory, which is somehow kindred to the composition of bones. However, the crown of the killer whale’s teeth is protected by enamel. ...
not all animals have the same sensory capabilities or social behaviors that make them responsive to stroking. The presence and distribution of C-tactile afferents, the nerve fibers responsible for sensing gentle touch, vary among different species. For instance, mammals are more likely to have these...
These included their bones, teeth and more. Scientists have found them on all six continents(大陆).The age of dinosaurs finally came to an end. Scientists wanted to know what caused it, so they looked into it. They studied and found all the traces(遗迹) dinosaurs left on the Earth. ...