The levels of organization of life from the least
complex to most complex are enumerated below:
a.
Organelles - the basic part of a living organism. It refers to the different
structures of the cell, whether prokaryotic or eukaryotic. (Ex. Mitochondria,
nucleus)
b. Cells
- building blocks of life that are composed of different molecules responsible
for the function of an organism. (Example: prokaryotic, eukaryotic cells)
c. Tissues
- combinations of cells that carry out a specific function in an organism.
(Example: Human skin)
d. Organs
- collections of tissues that perform specific functions. (Ex. heart, lungs)
e. Organ
Systems - composed of interconnected organs that function as a whole. Many
organisms, particularly mamamals, are composed of organ systems. (Ex.
respiratory, circulatory systems)
f. Organisms
– individual entities that specifically make-up a population. (Ex. Each tree in
the forest is an organism, each animal in sea is an organism)
g. Population – species living within a specific
location. It could be the same or different species that inhabit a place. (Ex. Birds
are species in the forest as well as bears)
h. Community – refers to the total number of
populations that inhabit a specific location. (Ex. All of the trees, insects,
birds that inhabit the forest are a community)
i. Ecosystem – consists of all living things that
function together as a group which also includes the non-living parts of the
environment. (Ex. Rain water, nitrogen in the soil)
j. Biosphere – the highest organization of life
that consist of all the collection of ecosystems in the planet. It includes the
land, air, water, even the atmosphere of the planet.
