Some interesting information about animals:
Animals are multicellular, eukaryotic organisms of the kingdom Animalia (also called Metazoa). All animals are motile, meaning they can move spontaneously and independently, at some point in their lives. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their lives. All animals are heterotrophs: they must ingest other organisms or their products for sustenance.
In everyday life, the terms "wild animals", "pets" often mean only mammals, sometimes - only four-legged land vertebrates (mammals, reptiles and amphibians) .In science term for animals enshrined greater value corresponding to the Latin Animalia (see. Above) . Therefore say to the animals, in addition to mammals, concerns a great many other organisms: fish, birds, insects, arachnids, molluscs, starfish, worms and all sorts of t. E. Man belongs to the animal kingdom, but traditionally considered separately - used in biology Turnover "animals and humans" or "animals, including humans."
The domestic dog is a domesticated canid which has been selectively bred for millennia for various behaviors, sensory capabilities, and physical attributes.Dogs perform many roles for people, such as hunting, herding, pulling loads, protection, assisting police and military, companionship, and, more recently, aiding handicapped individuals. This impact on human society has given them the nickname "man's best friend" in the Western world. In some cultures, however, dogs are also a source of meat.
The domestic cat is a small, usually furry, domesticated, and carnivorous mammal. They are often called housecats when kept as an indoor pet or simply cats when there is no need to distinguish them from other felids and felines. Cats are often valued by humans for companionship and their ability to hunt vermin.Cats are similar in anatomy to the other felids, with strong, flexible bodies, quick reflexes, sharp retractable claws, and teeth adapted to killing small prey. Cat senses fit a crepuscular and predatory ecological niche. Cats can hear sounds too faint or too high in frequency for human ears, such as those made by mice and other small animals. They can see in near darkness.
Tiger - a kind of carnivorous mammal of the cat family, one of the four members of the genus panther (lat. Panthera), which belongs to the subfamily of the big cats.