Why is a cold-blooded animal considered to be less advanced than a warm-blooded?
477309
Because, the conversion of fat, to heat, is a more complex process. And it is generally accepted that species evolve form simple, to complex.
724046
no such - the phrase can be found as - advanced mammal like reptile or advanced mammal studies\n\nbut since it is homework then your teacher is probably looking for something like HUMAN as in an advanced ( on an evolutionary scale ) mammal ( teachers can be wrong too )
392546
heat speeds up movement because molecules shrink and there is more room for movement. cold slows down molecule movement because they expand and there is less room for movement. It's basic physical science.
610732
Animals capable of temperature regulation within a given range are deemed homeotherms (alternatively homiotherms or homotherms). They have the ability to regulate temperature via negative feedback control.\nTemperature is controlled in a variety of ways in these animals.\nThe hypothalamus acts as a receptor in regulation, by detecting fluctuations in temperature. These receptors are better known as thermoreceptors.\nSkin also possesses thermoreceptors which can detect the temperature of the external environment. This information is relayed to the hypothalamus which can in turn transmit nerve pulses for corrective mechanisms to occur.\nIncreased sweating is a corrective response aimed to reduce the temperature of the organism.\nVasodilation is a corrective response where the blood vessels close to the skin surface become more dilated, meaning their is a larger surface area for heat to be lost of the external environment from the blood vessel carrying over-heated blood.\nVasoconstriction is the opposite of this and occurs when temperatures in an organism drop. The blood vessels become constricted so that minimal heat loss occurs.\nThe hairs on your body also play an important role in temperature regulation. A corrective response can occur where the hairs 'stand on end', and trap a layer of air between the hair and the skin. This insulation of warmer air next to the skin reduces heat lost, while a thin layer of insulation would increase heat loss.\nOther corrective mechanisms are involved, such as a drop in metabolic rate and shivering when temperatures drop.
895713
Because that is typical human body temperature, and many enzymes are derived from, or are studied in the human body.\n\n\nSome enzymes are able to handle very high temperatures, while others quickly denature (cook).  Cold doesn't really affect the enzyme structurally, but at colder temperatures, the enzyme is not able to catalyze the reactions, which is its function, fast enough.\n\n\nOr stated another way, 37 C is the temperature human enzymes, and many animal enzymes as well, are studied because that is where most of them function the best.\n\n\n\n\n\n.
41807
Cold temperatures- like that of ice- slow down molecules and keep them closer together.  Higher temperatures- like that of gases- speed up molecules and let them get lose and fly wherever they want.
131558
Hmm lets see... an amphibian is cold blooded....  (think lizards and crocodiles), so the best answer here is probably a heated chair.  Amphibian would be likely to want to sit on something warm.\n\nA heated rock chair?  THey like sitting on rocks!  lol  good luck
210284
fish are cold-blooded and cannot regulate their body temperature.  their body temperature will be within a few degrees of the ambient water temperature.  only mammals (dolphins, whales, etc) can self-regulate temperature.
922727
The reason is that heat causes molecules to move faster - the cold slows them down. Think of it like molasses when it is cold it is really thick and flows slowly - but if you heat it up it thins out and would flow more easily. When molecules are heated they are easier to manipulate. I hope this helped.
653245
Yeti, since he "lives" in a cold place, he is probably bigger and more tenacious since he has to work harder to get food. Look at bears, polar bears are bigger & fiercer than bears that live in the woods.
90401
The higher the salinity the more resistant something is to a cold temperature change. Meaning that it takes it longer to freeze. Frozen things are more dense, so something that takes longer to freeze is less dense.
108061
Because fishes are cold blooded animals....sweating is a way for regulating temperature that is often employed by mammals.
50504
Advanced is a relative term.  In terms of evolutionary history, the deciduous is newer and the conifer is older.  If you're teacher wants you to call one more "advanced," then the answer he/she is looking for is deciduous, but you tell him/her that Professor Beatz has a bone to pick with their thinking of newer adaptations as being necessarily more "advanced."  Conifers are still well adapted to their environments, they continue to thrive, and every species on the earth has the same number of years of evolutionary history behind its adaptations.
665126
Apparently Alaskan huskies, the faster breed commonly used now, isn't as resisitance to cold as siberian huskies.\n\nFrom Wikipedia \n\n"In very cold conditions, Alaskans often race in “dog coats” or belly protectors. Particularly in long distance races, these dogs often require “dog booties” to protect their feet from abrasion and cracking. Thus the considerations of hardiness and climate resistance prevalent in breeds such as the Siberian Husky and Canadian Inuit Dog are subordinated in the Alaskan husky to the overriding consideration of functional capability. The Alaskan huskies lack the dense coat required to keep them warm, and they are not as hardy as Siberians, often requiring extra care on the trails. Andre Nadeau says this is the reason his Siberians did so well in the 1998 Yukon Quest, where he led nearly the whole race until being passed by a team of Alaskan huskies.\n\nSiberians are still used occasionally as sleddogs in dogsled racing but have been widely replaced by the more popular Alaskan Husky and hound-type crossbreds that are specially bred and selected for speed and have less heavy coats. Siberian Huskies were designed to pull a light load over long distances at a medium pace, and simply can't keep up with their faster counterparts. Siberians are still popular in races restricted to purebreds and are faster than other pure sleddog breeds such as the Samoyed and Alaskan Malamute. Today the breed tends to divide along lines of “racing” Siberians versus “show” Siberians."\n\nThis site has some differing opinions on frostbite including that they can in fact ger frostbite.\nhttp://www.straightdope.com/classics/a990312a.html\n\n"The doctor says he's seen lots of frostbitten canine parts, including the nipples, vulva, and prepuce (no wonder the Iditarod has been condemned by animal-rights groups), but he's never seen any frostbitten feet. He thinks this may result from some peculiarity of the canine circulatory system. When people are exposed to extreme cold, vasoconstriction in the extremities reduces the flow of blood there, helping reduce heat loss and maintain the body's core temperature. Maybe this doesn't happen with dogs. Or maybe they just have more blood vessels down there. Whatever the case, it's not something peculiar to sled dogs. The doc says he's never seen frostbitten dog feet in private practice, either. He sees this as a survival mechanism: if a dog can't move, it dies.\n\nOther vets doubt that dogs enjoy any special protection, though they do concede that frostbitten paws are rare. A 1975 veterinary account of the Iditarod, written before Dr. Nelson's time, mentions a few cases, but these occurred because booties intended to protect dogs with paw blisters were tied too tight. Researchers have induced frostbitten paws in the lab to learn more about human frostbite, suggesting they don't see much difference between us and the pups circulationwise. One vet believes dogs are protected by the thick epithelial pads on the bottoms of their feet, their somewhat higher body temperature (100 to 102.5 degrees Fahrenheit), their thick fur (remember that the frostbitten areas noted by Nelson were hairless), and their practice of curling their paws next to their bodies when sleeping."
412552
because they are cold blooded; research from there\n\nand use spell check!
446873
by primitive and advanced, a paleontologist doesn't mean the same thing as one normally thinks of when you hear 'primitive' or 'advanced'.\n\nPrimitive means closer to the ancestral form, unmodified from that which has been inherited through phylogeny.  A more proper term would be plesiomorphic.  Two groups which share a plesiomorphic trait, such as five fingers, would be synplesiomorphic, suggesting that those lineages inherited the trait from a common ancestor.  For example, bats, humans, tree frogs and monitor lizards would share the synplesiomorphy of five digits on the forelimb.  This trait can be traced back to the Rhipidistian Sarcopterygian fish.  Primitive does not mean inferior, only that it has not been modified from the ancestral state.\n\nAdvanced, derived or synapomorphous traits are ones that have been modified from the ancestral condition.  The two digits of the T. rex are highly derived from the original five digit condition.  So is the two foreclaws possessed by the two-toed sloth.  These traits, although highly derived, so not share a similar phylogenetic origin.  They also are not necessarily superior to five gigits, or 'more evolved', they are simply an adaptation in that lineage that has taken place that is different that the adaptations that earlier organisms in that lineage possessed.\n\nThe reason we (and all tetrapods) have five digits as a primitive trait is due to the fin structure of that first fishie that started wandering out on land and becoming the first amphibian.  Those Sarcopterygians had a number of bony ossicles in their loby fins that helped provide some support to their fleshy fins as they pushed their way onto land.  It just happened that those ossicles were arranged in more or less five rows, and these rows eventually became adapted to become the digits of our ancestral amphibian great-grandparents.  Had we evolved from the Actinopterygians (ray-finned fish), perhaps we'd have thirty or forty fingers.  Who knows?
537451
Because animals don't have to accomplish as many tasks, so they can specialize on a few specific tasks and learn to perfect them. Humans take on a greater number of tasks, most of which are highly complex, so they can't specialize as easily.