"Warm-blooded" is used to describe animals that generate their own heat. Warm-blooded creatures are often called ectotherms. Mammals and birds are warm-blooded; reptiles and amphibians are cold-blooded.Know More
Reptiles and other cold-blooded animals must draw heat form the environment, and they are slower and less active when the temperature drops. They also have a slower metabolism, which is why they often spend long periods of time resting. However, being cold-blooded has an advantage: they do not have to eat as much as their warm-blooded counterparts.
In exchange for their more robust dietary demands, warm-blooded animals are able to cope with a broader range of environmental conditions, but hotter weather is often a greater threat than cold weather. Warm-blooded creatures are able to move at a faster rate of speed than cold-blooded ones. This is part of the reason why mammals and birds can migrate long distances.
Some creatures, however, are not clearly warm-blooded or cold-blooded. The dinosaurs, in particular, seem to straddle this gap. If they were strictly cold-blooded, they would have been far slower than most experts believe. If they were warm-blooded, their dietary needs would have been more than most think is realistic. While there is still a considerable amount of debate, many experts now believe that dinosaurs were neither truly warm-blooded nor cold-blooded.Learn more about Zoology
Birds are warm-blooded. Warm-blooded animals are those that can generate enough body heat to regulate their own temperatures, rather than relying on the ambient environment for heat as in scaly reptiles, amphibians or most fish. Birds belong to one of the two broad groups of animals that are warm-blooded.Full Answer >
Selective breeding, also called artificial selection, is carried out by mating animals or crossing plants with desired characteristics or traits to produce offspring in which those traits are more dominant, according to Encyclopedia Britannica. The breeder attempts to isolate the genes responsible for the desired trait in subsequent generations so the quality becomes more pronounced and fixed.Full Answer >
Polar bears are apex predators of the arctic ecosystem. Polar bears primarily prey upon bearded, ringed, hooded and harp seals, but they also hunt walruses, sea birds and small mammals. Because of their strong sense of smell, polar bears are also excellent scavengers, consuming significant amounts of carrion and human refuse. During the brief time when vegetation is available, polar bears consume flowers, leaves and berries.Full Answer >
A common adaptation of swamp animals is webbed feet, which they need to traverse the water effectively in order to survive. Camouflage is another adaptation that is important to the survival of animals in swamp environments.Full Answer >