The study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behavior, origin, and distribution.

An individual animal, plant, or single-celled life form.

The living components of an ecosystem.

Non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems.

Prokaryotic/Prokaryote

A microscopic single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles.

Any cell or organism that possesses a clearly defined nucleus.

Having or consisting of many cells.

Autotrophic/Autotroph

An organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.

Heterotrophic/Heterotroph

An organism deriving its nutritional requirements from complex organic substances.

Relating to, involving, or requiring free oxygen.

Relating to, involving, or requiring an absence of free oxygen.

Allows living organisms to adapt to their environment and maintain homeostasis; in government.

The production of offspring by a sexual or asexual process.

The production of new living organisms by combining genetic information from two individuals of different types (sexes).

A type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes.

The process of nourishing or being nourished, especially the process by which a living organism assimilates food and uses it for growth and for replacement of tissues.

The process by which metabolic wastes and other non-useful materials are eliminated from an organism.

The movement of ions or molecules across a cell membrane in the direction opposite that of diffusion, that is, from an area of lower concentration to one of higher concentration.

The production of an organic compound in a living thing, especially as aided by enzymes.

Defined as the irreversible increase in the dry mass of an organism.

The sum of the chemical reactions that take place within each cell of a living organism and that provide energy for vital processes and for synthesizing new organic material.

The ability to maintain a constant internal environment in response to environmental changes.

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Science Vocabulary 2

Science Words To Learn

Term	Definition
Biology	The study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behavior, origin, and distribution.
Organism	An individual animal, plant, or single-celled life form.
Biotic (factor)	The living components of an ecosystem.
Abiotic (factor)	Non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems.
Prokaryotic/Prokaryote	A microscopic single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles.
Eukaryotic/Eukaryote	Any cell or organism that possesses a clearly defined nucleus.
Unicellular	Consisting of a single cell.
Multicellular	Having or consisting of many cells.
Autotrophic/Autotroph	An organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.
Heterotrophic/Heterotroph	An organism deriving its nutritional requirements from complex organic substances.
Respiration	The action of breathing.
Aerobic	Relating to, involving, or requiring free oxygen.
Anaerobic	Relating to, involving, or requiring an absence of free oxygen.
Regulation	Allows living organisms to adapt to their environment and maintain homeostasis; in government.
Reproduction	The production of offspring by a sexual or asexual process.
Sexual	The production of new living organisms by combining genetic information from two individuals of different types (sexes).
Asexual	A type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes.
Nutrition	The process of nourishing or being nourished, especially the process by which a living organism assimilates food and uses it for growth and for replacement of tissues.
Excretion	The process by which metabolic wastes and other non-useful materials are eliminated from an organism.
Transport	The movement of ions or molecules across a cell membrane in the direction opposite that of diffusion, that is, from an area of lower concentration to one of higher concentration.
Synthesis	The production of an organic compound in a living thing, especially as aided by enzymes.
Growth	Defined as the irreversible increase in the dry mass of an organism.
Metabolism	The sum of the chemical reactions that take place within each cell of a living organism and that provide energy for vital processes and for synthesizing new organic material.
Homeostasis	The ability to maintain a constant internal environment in response to environmental changes.

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