What are...?

Question

What are the six signs of life? first person to answer correctly(to my satisfaction) will get best answer. Thanks for the help

OK for that second person i am not in this section a lot and i had to do my homework quickly so i wasn't reading a lot.. but thank you all for the help, i wish i could give Prof. Beatz points but i said to the first person correct

Answer 1

movement
respiration
sensibility
nutrition
growth
reproduction
excretion


thats 7, but i know that they're right.

thanks for your time

xxx

Answer 2

Wow.

I am worried about why this is posted in Other instead of biology.
Do you want to know what constitutes a life form or how to tell that you are not dealing with a corpse?

The classic traits of living organisms are:
Metabolism
Growth and Reproduction
Differentiation (or Organization)
Communication
Movement
Evolution

Some would split Growth and Reproduction into two traits and remove Evolution. Reproduction must be self contained (viruses are not alive). Differentiation and Movement are not present in all microbial life.

Considering the great debate about mutation and evolution, perhaps a different six traits would include:
Self contained
Self organizing
Self regulating
Self adapting or responding
Self expressing (communicating)
Self reproducing (as a species, not as individuals)

If you mean how could you tell if a person was alive, then the classical tests are:
Respiration (Breathing)
Pulse (Heartbeat)
Nerve activity (Reflex or Respond to Pain)
Brain activity (MRI or CT scan)
No decrease in Body Temperature
Lack of Rigor mortis.

Answer 3

Wikipedia gives 7, but they are different than stated above:

1) Homeostasis: Regulation of the internal environment to maintain a constant state; for example, sweating to cool off.

2) Organization: Being composed of one or more cells, which are the basic units of life.

3) Metabolism: Production of energy by converting nonliving material into cellular components (synthesis) and decomposing organic matter (catalysis). Living things require energy to maintain internal organization (homeostasis) and to produce the other phenomena associated with life.

4) Growth: Maintenance of a higher rate of synthesis than catalysis. A growing organism increases in size in all of its parts, rather than simply accumulating matter. The particular species begins to multiply and expand as the evolution continues to flourish.

5) Adaptation: The ability to change over a period of time in response to the environment. This ability is fundamental to the process of evolution and is determined by the organism's heredity as well as the composition of metabolized substances, and external factors present.

6) Response to stimuli: A response can take many forms, from the contraction of a unicellular organism when touched to complex reactions involving all the senses of higher animals. A response is often expressed by motion, for example, the leaves of a plant turning toward the sun or an animal chasing its prey.

7) Reproduction: The ability to produce new organisms. Reproduction can be the division of one cell to form two new cells. Usually the term is applied to the production of a new individual (either asexually, from a single parent organism, or sexually, from at least two differing parent organisms), although strictly speaking it also describes the production of new cells in the process of growth.

If I were to curb that down to 6, i'd get rid of adaptation, because a species adapts, but an organism does not. Hence I think adaptation is wrong. Evolution is driven by differential progeneration and death, but that's not to say that an evolutionarily unfit life form that dies was never alive to begin with.

Answer 4

eating,drinking,having sex,loving someone-being loved by someone,having a baby and MONEY(you can't do anything without it,and I think The God created us and than created money)