What is the definiton of life?

Definition of life, albeit at first glance on easy design, will prove to be incredibly difficult. Each proposed definition of life suffers from one of two problems: the definition is wide enough, that it allows things to generally accept as inanimate to be defined as living; Or it is so specific that more exotic forms of life should appear, it may not be a classic view. Some definitions do not require all seven, while others require other components to be present. Basic criteria for life are:

• Growth: The living organism must grow in some way, most often by converting external materials into offspring or other weight.
• stimulation reactions: living organisms must respond to stimuli in its environment. The amount of stimuli responded to may vary as well as specific reactions, but must exist uRaty interface between the organism and the outside world. The stimuli can lead to simple metabolic shifts or cause complex behavior changes.
• metabolism: living organisms must be able to convert energy in its environment into a new form. This definition is often determined by much more scientifically by more preliminary terms to ensure that the reactions of pure energy, such as stars are excluded.
• Homeostasis: Living organisms are able to adjust to a certain level to stay in the set parameters. This is related to the stimulation reaction, but it is further built on this idea.
• Reproduction: All living organisms are able to replicate. This can be done by interacting with other organisms (sexually) or autonomically (asexually).
• mutations: In addition to being able to reproduce, living organisms must be able to spontaneously change and develop between generations.
• Autonomous Movement: The living thing is able to move under its own power. This movement can be very small and does not require locomotion, but somehow must move.

previous criteria for definition of life easily include most of the things we usually consider living. Members Archaea domains, including animals, plants and mushrooms, are easily able to express seven characteristics of life. Bacteria also meet seven characteristics, as well as archaea, or creation found in thermal ventilation openings on the ground.

Viruses

are an interesting case because they can often show no metabolism at all. The viruses at this stage are considered inanimate, as well as the human corpse would be considered inanimate. Unlike the human corpse, however, the virus can regain its life status at some point Future.

Some entities that are often considered alive are shown that they are not based on our definition. priony -Nejslav is notAt first glance, many crazy cows show many characteristics of life. However, on closer control, we find that they are metabolizing or reproducing, and therefore they cannot be said to be alive.

For further defining life, many scientists include extremely specific criteria, such as the requirement of lipids and proteins. Although it makes sense to solve exclusively with life on Earth, other scientists are afraid that they will present classification problems should be discovered "life" on other planets or deep space objects.

so far, the qualitative definition of life must be sufficient; But because science performs new discoveries and meets new challenges-must be extraterrestrial microbes or artificial intelligence-class classes are likely to develop to include new life forms and our understanding.