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(singular) In biology, the cell is the basic structural, functional, and biological unit of all known organisms. 

A green pigment, essential in photosynthesis, found in plants, algae, and cyanobacteria. 

A volume that is made by a cube that is 1 centimetre on each side.

To become reduced in size.

Country in the Balkans.

A set of values that show an exact position using the x, y and z axes.

(singular) In biology, the cell is the basic structural, functional, and biological unit of all known organisms. 

An organelle in plants and algae that contains chlorophyll and conducts photosynthesis. 

The area equal to a square that is 1 centimeter on each side.

A lens that curves out. It is thicker in the middle than at the edges, and causes light to converge. Used in glasses to correct far-sightedness.