Single-celled organism

An organism which only has a single cell. Example: an amoeba

When substances move into and out of the cell.

The movement of water across the cell membrane from areas of high concentration of water to areas of low concentration of water

...carry signals throughout our body

...covers our body and even organs

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Science U2L3

Question	Answer
Single-celled organism	An organism which only has a single cell. Example: an amoeba
Diffusion	When substances move into and out of the cell.
Osmosis	The movement of water across the cell membrane from areas of high concentration of water to areas of low concentration of water
Muscle tissue...	...move our bones
Nervous tissue...	...carry signals throughout our body
Epithelial tissue...	...covers our body and even organs