A structure within a cell that performs a specific function is a(n) A. organelle
B. organ
C. endoplasmic reticulum
D. flagella

A. Organelles

Explanation:

Organelles are specialized structures that perform various jobs inside cells. The term literally means “little organs.” In the same way organs, such as the heart, liver, stomach, and kidneys, serve specific functions to keep an organism alive, organelles serve specific functions to keep a cell alive.

A structure within a cell that performs a specific function is an organelle.

Explanation:

An organelle is a structure inside the cell that preforms functions that are necessary for the cell.

Examples of organelles are the ER, the Golgi Apparatus, and the Mitochondria.

Hope this helps.

eukarya because is is like alche and b is bacteria and d is animals

explanation:

b.