DEFINITIONS+OF+LIVING+ORGANISMS

**NUTRITION** consists of taking substances from the environment and using them for growth,energy, repair and waste elimination.
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**INTERACTION** consists of perceiving changes in the environment, called stimuli, and reacting to them in an appropiate way.

**REPRODUCTION** is the ability that living organisms have to produce descendants with the same characteristics.

**CELL** is the smallest unit of a living organism that can carry out the vital functions ||  ||
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Something **MICROSCOPIC** is so small that it cannot be seen without a microscope

**PROKARYOTIC** cells are cells that have DNA in their cytoplasm. They are bacteria

**EUKARYOTIC** cells contain DNA in an organelle called the nucleus. They are found in fungi, protoctists, plants and animals. ||
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**PASMATIC MEMBRANE**. A very thin layer that surrounds the cell and **controls which substances go in and out of the cell.**

**CYTOPLASM.** A thick liquid that fills the inside of the cell. It **contains many cell organelles**.

**CHLOROPLAST**. An organelle found in plant cells. Its job is to **perform photosynthesis.**

**MITOCHONDRION**. The organelle that **produces the energy** needed by the cell.

**CENTRIOLES**. The organelles that take part in **cell division and in cilia and flagella formation**.

**DNA.** Genetic material. This is a fibre-like substance that **controls the cell´s activities.**

**NUCLEUS.** The organelle that **contains the genetic material in eukaryotic cells**. ||  ||   ||