Science Vocab

23 terms by golfbum 

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Organism

any living thing, whether it's one cell of many cells.

Cell

the basic unit of structure and function in an organism.

Unicellular

single-celled organisms. (ex: dog)

Multicellular

organisms composed of many cells. (Ex: dog)

Development

the process of change that occurs during an organism's life.

Stimulus

a change in an organism's surroundings that causes the organism to react.

Response

an action of change in a behavior by an organism as a result of a stimulus.

Reproduction

the ability to produce offspring.

Spontaneous Generation

the mistaken idea that living things arise from nonliving sources.

Controlled Experiment

when a scientist performs two tests (two groups) during an experiment.

Autotrophs

organisms that make their own food.

Heterotrophs

organisms that cannot make their own food.

Homeostasis

maintaining stable internal conditions despite changes in the surroundings.

Classification

the process of grouping things based on similarities.

Taxonomic

the scientific study of how living things are classified.

Binomial Nomenclature

a naming system for organisms. Every organism is given a two-part name.

Genus

the first part of an organism's scientific name. Must be capitalized.

Species

the second part of an organism's scientific name. Is not capitalized.

Evolution

the process by which species gradually change over time.

Taxonomic Key

a series of paired statements that described the physical characteristics of different organisms.

Nucleus

a dense area in a cell that contains the genetic material (DNA).

Prokaryotes

organisms whose cells lack a nucleus.

Eukaryotes

organisms whose cells contain a nucleus.

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