levels of biological organization 1.2 Flashcards
smallest, basic unit of matter.
atom
atoms are held together by one or more bonds to form _
molecules
the basic structural and functional unit of life.
cell
why are cells considered the basic structural and functional unit of life?
because cells are where metabolic processes occur that keep the organisms alive.
the order of the levels of biological organization
cell-tissue-organ-organ system-organism-population-community-ecosystem-biosphere
what is the first level of biological organization?
cell
cells are made up of smaller structures called?
organelles
cells can be classified into?
prokaryotic and eukaryotic cells
a type of cell that does not have a membrane-bound nuclei
prokaryotic cell
a type of cell that does have membrane-bound organelles and nuclei
eukaryotic cell
group of cells that have a similar structure and that function together as a unit.
tissue
tissues group together to perform a common function, forming _
organs
a group of organs that work together to perform a specific function
organ system
an individual entity
organism
a collective term for all the individuals of the same species living within a specific are.
population
