basic unit of structure and function in an organism
Cell
single celled organisms
Unicellular
many celled organisms
Multicellular
the combination of chemical reactions through which organisms builds up or breaks down materials
Metabolism
a change in an organism’s surroundings that causes the organism to react
Stimulus
an action or change in behavior
Response
the process of change that occurs during an organism’s life, producing a more complex organism
Development
involves only one parent and produces offspring that are identical to the parent
Asexual reproduction
involves two parents and combines their genetic material to produce a new organism that differs from both parents
Sexual reproduction
mistaken idea that living things can arise from nonliving sources
spontaneous generation
a scientist carries out a series of tests that are identical in every respect except for one factor
Controlled experiment
organisms that make their own food
Autotroph
organisms that cannot make their own food
Heterotroph
the maintenance of stable internal conditions
Homeostasis