The Hierarchy or Levels of Biological Organization

Subatomic (particle)

• units of matter below the size of an atom

Atombasic unit of matter

Moleculeelectrically neutral group of two or more atoms held together by covalent chemical bonds

(Compound- pure chemical substance consisting of two or more different chemical elements)

Caffeine

Macromolecule

• very large molecule, composed of hundreds or thousands of atoms

• DNA or protein, esp. a polymer,

Organelle

• Specialized part of a cell having some specific function

CellsBasic unit of life

Tissuea group of cells that perform a similar function

Organsa collection of tissues joined as unit to serve a common function;

Organ Systemsis a group of organs that work together to

perform a certain task.

OrganismA single individual

PopulationA group of organisms of the same type (species) living in the same area.

CommunityPopulations that live together in a given area.(Human population, House Elf population, Bacteria population)

Pretend living thing!

Bacteria (That’s too

small to see.)

EcosystemCommunities and the nonliving surroundings. (Urban Ecosystem)

BiomeA major regional or global biotic community

Deciduous Forest of England

BiosphereAll of the land, water and air (biomes) where organisms can live.

Hogwarts is around the

other side.

Earth

Planets

Solar Systems

Galaxies

Universe

Realm of

Ecology