science test

Metabolism

Requires energy to sustain life processes.

Cell Theory

The foundational concept in biology that states all living things are made of cells, cells are the basic unit of life, and all cells come from existing cells.

Prokaryotes

Cells without a nucleus, simple in structure, and mostly single-celled organisms, such as bacteria.

Eukaryotes

Cells with a nucleus, more complex, can be single or multicellular, including plants and animals.

Osmosis

The movement of water across a selectively permeable membrane from an area of low concentration to an area of high concentration.

Passive Transport

Movement of substances across a cell membrane without the use of energy.

Circulatory System

The organ system that transports blood and oxygen throughout the body.

Homeostasis

The ability of an organism to maintain a stable internal environment.

Diffusion

The process by which molecules spread from areas of high concentration to areas of low concentration.

Organ System

A group of organs that work together to perform specific functions in an organism.