Smallest unit of matter

Two or more atoms bonded together

The smallest unit of a living organism

A group of cells that function together

A collection of tissues formed together to perform a specific function

A group of organs that work together

Placing items in order of complexity

The breaking down of food to use as nutrients

Body system responsible for circulating oxygen and blood throughout the body

Body system responsible for sending messages from the brain to the rest of the body

Body System that allows the organism to breathe

Body system responsible for the breaking down of nutrients

Body System that consists of the muscles and bones of an organism

control center of the cell; contains DNA

Produces proteins inside of a cell

Powerhouse of the cell; provides energy for cellular respiration

Thin, flexible barrier around a cell; controls what enters/leaves the cell

Supports and protects the cell; found only in plant cells

Stores water and other materials in a cell

Network of canals used to transport and store substances in a cell; a pathway between nucleus and cell membrane

Organelle in a cell that captures sunlight for photosynthesis

A jellylike fluid inside the cell in which the organelles are suspended

The three part scientific theory that states: 1) All organisms are composed of cells, 2) All cells come from pre-existing cells, and 3) Cells are the basic unit of life

The balanced, at rest state of a living organism

Changes in a species of organisms over a long period of time that sometimes results in the formation of an entirely new species

Beneficial traits are "selected" and passed on through generations resulting in gradual change over time.

The set of genes in our DNA which is responsible for a particular trait

The physical expression, or characteristics, of a trait

A genotype consisting of two identical alleles at a given locus

A genotype consisting of two different alleles at a given locus

A relationship between two or more organisms

A symbiotic relationship in which one organism benefits and the other is unaffected.

A symbiotic relationship in which one organism benefits and one is harmed

A symbiotic relationship in which both organisms benefit

A relationship in which one organism benefits from killing and eating another organism

A relationship in which two or more organisms need the same resources

An organism that creates its own food

An organism that gets its food from eating another organism

The process in which plants use carbon dioxide, sunlight, and water to form glucose and oxygen

The process in which organisms use glucose and oxygen to form energy, carbon dioxide, and water

Mass cannot be created or destroyed