Endotherms produce their own heat; ectotherms rely on environmental heat. Most ectotherms are cold-blooded while most endotherms are warm-blooded, but there are exceptions. Mammals are endotherms, and reptiles and amphibians are ectotherms.Know More
Ectotherms must absorb heat from their environment to maintain their body temperature, and the weather can have a profound effect on their behavior. However, they do not have to eat as much as their endotherm counterparts. Crocodiles and alligators, for example, can go weeks or months without eating, but they also remain inactive during most of the day and save their energy for eating, mating and protecting their territory. Endotherms, on the other hand, are able to produce far more energy but must eat regularly. Mammals tend to be more active than reptiles, but they must eat far more to survive.
Scientists are still not sure whether dinosaurs should be classified as endotherms or ectotherms. If dinosaurs were cold-blooded, they would have been far slower than many experts believe. If they were warm-blooded, they would have had to eat a tremendous amount of food. Many now believe that dinosaurs were neither true endotherms nor true ectotherms and had a unique metabolism. This may be why they died off while many reptiles and amphibians survived.Learn more about Zoology
Most animals are made up of more than one cell, have cells that group into tissue, reproduce sexually, are capable of movement and ingest other organisms to obtain energy. There are exceptions to many of these characteristics, however.Full Answer >
The primary difference between vertebrates and invertebrates is the presence of a backbone or spinal column, which vertebrates have and invertebrates do not. Examples of vertebrates are humans, dogs, cats and birds. Examples of invertebrates are flatworms, mollusks, sea urchins and insects.Full Answer >
Genus and species are part of the biological classification system for living things. A genus encompasses a group of species that are closely related. Species is the most specific level of scientific classification, which typically groups animals that are so similar that, when they breed, they produce fertile offspring.Full Answer >
According to Wentworth-Douglass Hospital, a CT scan utilizes ionizing radiation to produce an image, and an MRI uses magnets and radio frequencies to produce an image of the body. Both machines look very similar, but they utilize different imaging techniques to look inside the body.Full Answer >