Animals
Animals are a major group of multicellular, eukaryotic organisms of the kingdom Animalia or ****zoa. Their body plan eventually becomes fixed as they develop, although some undergo a process of ****morphosis later on in their life. Most animals are motile, meaning they can move spontaneously and independently. Animals are also heterotrophs, meaning they must ingest other organisms for sustenance.
Most known animal phyla appeared in the fossil record as marine species during the Cambrian explosion, about 542 million years ago.
Domesticated animal (plural domesticated animals)
An animal that has become tame as a result of belonging to a species which has been kept and bred by human beings, especially for use as food, as an aid in work, or as a pet.
To be considered domesticated, a population of animals must have their behavior, life cycle, or physiology systemically altered as a result of being under human control for many generations. Animals included in this list that do not fully meet this criterion are designated "captive-bred" or semi-domesticated. The term domestic animal applies to domesticated animals that actually live in physical proximity to humans, such as pets and guard animals, or even food species kept very close, e.g. to live on domestic food scraps and/or so their body heat can be used as 'stable heating.
Wild Animals
These species experience their full life cycles without deliberate human intervention.
Wildlife includes all non-domesticated plants, animals, and other organisms. Domesticating wild plant and animal species for human benefit has occurred many times all over the planet, and has a major impact on the environment, both positive and negative.
Wildlife can be found in all ecosystems, Deserts, rain forests, plains, and other areas—including the most developed urban sites—all have distinct forms of wildlife. While the term in popular culture usually refers to animals that are untouched by human factors, most scientists agree that wildlife around the world is impacted by human activities.
Humans have historically tended to separate civilization from wildlife in a number of ways including the legal, social, and moral sense. This has been a reason for debate throughout recorded history. Religions have often declared certain animals to be sacred, and in modern times concern for the natural environment has provoked activists to protest the exploitation of wildlife for human benefit or entertainment. Literature has also made use of the traditional human separation from wildlife.
Dog
The dog (Canis lupus familiaris,[2] pronounced /ˈkeɪ.nis ˈluːpəs fʌˈmɪliɛəris/) is a domesticated subspecies of the gray wolf, a mammal of the Canidae family of the order Carnivora. The term can also be used more generally to encompass any member of the biological family Canidae, the subfamily Caninae or the genus Canis (also called "true dogs"). When referring to Canis lupus familiaris, the term is used to specify both feral and pet varieties. The domestic dog has been one of the most widely kept working and companion animals in human history.
Cat
The cat (Felis catus), also known as the domestic cat or house cat to distinguish it from other felines and felids, is a small predatory carnivorous species of crepuscular mammal that is valued by humans for its companionship and its ability to hunt vermin, snakes, scorpions and other unwanted household pests. It has been associated with humans for at least 9,500 years.
Lion
The lion (Panthera leo) is a member of the family Felidae and one of four big cats in the genus Panthera. With exceptionally large males exceeding 250 kg (550 lb) in weight,[4] it is the second-largest living cat after the tiger. Wild lions currently exist in Sub-Saharan Africa and in Asia with a critically endangered remnant population in northwest India, having disappeared from North Africa, the Middle East, and Western Asia in historic times. Until the late Pleistocene (about 10,000 years ago), the lion was the most widespread large land mammal beside humans[citation needed]. They were found in most of Africa, much of Eurasia from western Europe to India and, in the Americas, from the Yukon to Peru.
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2009-09-05, 12:44
Animals
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