any living thing, whether it's one cell of many cells.
the basic unit of structure and function in an organism.
single-celled organisms. (ex: dog)
organisms composed of many cells. (Ex: dog)
the process of change that occurs during an organism's life.
a change in an organism's surroundings that causes the organism to react.
an action of change in a behavior by an organism as a result of a stimulus.
the ability to produce offspring.
the mistaken idea that living things arise from nonliving sources.
when a scientist performs two tests (two groups) during an experiment.
organisms that make their own food.
organisms that cannot make their own food.
maintaining stable internal conditions despite changes in the surroundings.
the process of grouping things based on similarities.
the scientific study of how living things are classified.
a naming system for organisms. Every organism is given a two-part name.
the first part of an organism's scientific name. Must be capitalized.
the second part of an organism's scientific name. Is not capitalized.
the process by which species gradually change over time.
a series of paired statements that described the physical characteristics of different organisms.
a dense area in a cell that contains the genetic material (DNA).
organisms whose cells lack a nucleus.
organisms whose cells contain a nucleus.