There are 7 criteria for an organism to be considered alive:
(a) Homeostasis: Regulation of the internal environment to
maintain a constant state
(b) Organization: Being composed of one or more cells, which are the basic units of life.
(c) Metabolism: Consumption of energy by converting nonliving material into cellular components (anabolism) and
decomposing organic matter (catabolism). Living things
require energy to maintain internal organization (homeostasis) and to produce the other phenomena
associated with life.
(d) 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.
(e) 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.
(f) 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.
(g) 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.
Because of these factors, cells are alive.
No, red blood cells are not considered to be alive because they lack a nucleus and other organelles typically found in living cells.
Once it is roasted the seed can no longer germinate and grow into a plant. It is no longer considered alive.
No, blood itself is not considered alive because it does not have the characteristics of living organisms, such as the ability to grow, reproduce, or respond to stimuli. However, blood does contain living cells, such as red blood cells, white blood cells, and platelets, that perform vital functions in the body.
All living things are organisms. There is no such thing as a living cell that is not an organism.
Apples are considered alive even after being picked due to the presence of living cells and biochemical processes within the fruit. However, once harvested, they are considered detached from the tree and will eventually begin to deteriorate and decay.
No, red blood cells are not considered to be alive because they lack a nucleus and other organelles typically found in living cells.
Tumors consist of living cells but they are not considered their own organisms.
fire is considered alive because it needs oxygen to burn. flowers are alive because it needs heat for energy to create more cells, CO2 because they need it to produce necessary sugars. and it grows... of course
Viruses are the only living things that do not have cells. They are considered acellular because they consist of genetic material surrounded by a protein coat but lack the structures found in cells, such as organelles.
They are both filled with living material.
Yes, Phloem cells are alive.
Once it is roasted the seed can no longer germinate and grow into a plant. It is no longer considered alive.
No, blood itself is not considered alive because it does not have the characteristics of living organisms, such as the ability to grow, reproduce, or respond to stimuli. However, blood does contain living cells, such as red blood cells, white blood cells, and platelets, that perform vital functions in the body.
the superficial cells of stratum granulosum are dead,but the deeper cells are alive.
The cell, is the smallest part of the body that is said to be alive.
The smallest thing that can be considered alive is a single-celled organism, such as a bacterium or a protozoan. These organisms are made up of a single cell that carries out all the functions necessary for life, including metabolism, growth, and reproduction. They are considered alive because they exhibit characteristics of living organisms, such as responding to stimuli and maintaining homeostasis.
All living things are organisms. There is no such thing as a living cell that is not an organism.