Final answer:
The function of the nucleus in Euglena cells is to contain DNA and control the cell.
Step-by-step explanation:
The function of the nucleus in Euglena cells is to contain DNA and control the cell. The nucleus of a cell stores the genetic information in the form of DNA and is responsible for regulating the cell's activities by controlling the synthesis of proteins. In Euglena cells, the nucleus plays a crucial role in growth and reproduction.
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