Facts_About_Animals_Amazing_Facts |Interested Video

Animals are a diverse group of organisms that include everything from insects and fish to mammals and birds. They are characterized by the presence of cells with a nucleus, the ability to move, and the ability to respond to stimuli. Many animals also have specialized organs and systems for sensing their environment and for reproducing. Some animals, such as mammals and birds, are warm-blooded and have a relatively high metabolic rate, while others, such as reptiles and fish, are cold-blooded.