Everything in our world can be divided into two categories:
(1) thing consists of at least one cell
(2) thing NOT consists of at least one cell
List of things consists of at least one cell: Animal, plant, fungi, protist, monera, food made of plant or meat, wood doll, wood furniture, sweat, excrement, etc.
List of things NOT consists of at least one cell: Virus, molecules, atoms, protons, electrons, neutrons, energy, H₂O, fire, metal, rocks, oxygen, light, etc.
In the macro world up until the micro world of cell, preceding death, things that consists of at least one cell like animal, plant, fungi, protist and monera, have the characteristics including capacity for growth, reproduction, functional activity, continual change preceding death, and carries DNA.
Here i label "thing consists of at least one cell" bubu.
In the macro world, we CANNOT observe MOST of the above characteristics on all the things NOT consists of at least one cell.
In the micro world, we CAN observe SOME of the above characteristics on things NOT consists of at least one cell like molecules and virus.
I DON'T label "thing NOT consists of at least one cell" bubu.
So the definition for bubu is: thing consists of at least one cell.
Maybe some people will ask why label it bubu? It doesn't matter, we can also label it bobo, bibi or something else. The label bubu/bobo/bibi is just a short term for "thing consists of at least one cell".
Now, the definitions of the label "alive" and "living" need a little bit adjustment.
The new definition for alive and living are: an adjective to describe thing which has the characteristics including capacity for growth, reproduction, functional activity, and continual change preceding death.
The definition of die: (of a person, animal, or plant and perhaps fungi, protist, monera, molecules and virus?) stop living.
Characteristics of Living Things:
(1) DNA
Cell carries deoxyribonucleic acid or DNA, the material made up of chromosomes that passes down genetic information which includes inherited traits of its lineages.
(2) Metabolic Action
For something to live, it must consume food and convert that food into energy for the body. All living entities employ interior chemical reactions to convert eaten food into energy through a form of digestion, and then transmit the energy extracted to the cells of the body. Plants and trees convert energy from the sun into food and absorb nutrients in the soil through their roots.
(3) Internal Environment Changes
Things that are alive make changes to their internal environment. Called homeostasis, this represents the actions a body takes to protect itself. For instance, when the body gets cold, it shivers to generate heat. All living things share this feature.
(4) Living Things Grow
To grow, a living thing must have cells that divide in an orderly way to create new cells. As cells grow, expand and divide, the creature becomes larger over time. Scientists use growth and development as a measure of alive.
(5) The Art of Reproduction
Living things grow and reproduce to make more living things like themselves. This can occur through asexual reproduction or by producing other living things through sexual reproduction. The new thing’s DNA is like that of the cell it came from.
(6) Ability to Adapt
Plants, animals, people, and even microorganism that live can adapt to the world around them. Adaptability involves the traits that help a living thing survive in its environment. One such trait includes the way different animal’s coats change through the seasons to make it hard for prey or predator to be seen.
(7) Ability to Interact
A living thing will interact with another living thing -- whether it is the same type of thing, a threat or a neutral thing, there is some form of interaction between the two. For example, flowers interact with bees by releasing pollen for it to be picked up and dispersed among female plants during reproduction. Plants like the Venus flytrap interact with nature by enclosing itself over flies, lizards and other edible insects that land within its grasp.
(8) The Process of Respiration
Respiration is more than just breathing. It represents the ability of a living thing to convert energy to feed the cells, using oxygen to break down sugars and produce carbon dioxide as a by-product expelled during exhalation. All living things have some form of respiration, though the process may differ between them.
(9) Living Things Move
To classify an thing as living, it must exhibit some form of movement. Though humans and animals obviously move, other items such as plants also move though it is hard to see without a time-lapse camera. Plants move their buds or leaves toward sunlight or away from shaded areas to promote growth.
A little edit from this link.
What Are the Ten Characteristics of Living Organisms?
Maybe some people will ask why label it alive or living? It doesn't matter, we can also label it abubu, abobo, bubing, bobing or something else. The label alive/abubu/abobo/living/bubing/bobing is just a short term for "an adjective to describe thing which has the characteristics including capacity for growth, reproduction, functional activity, and continual change preceding death".
In the macro world up until the micro world of cell, we can observe that preceding death some bubus like animal, plant, fungi, protist and monera are alive.
In the macro world, we can observe that all non-bubus have a little characteristics of the label "alive".
In the micro world, we can observe that some non-bubus like molecules and virus have some characteristics of the label "alive".
Does the above statements contain any errors?
Does the above statements help to draw a clear line to distinguish living thing from non-living thing?