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Observe and interpret the animal cell diagram to answer the following questions.
 
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Answer variants:
Rough Endoplasmic Reticulum
Smooth Endoplasmic Reticulum
Mitochondria
Nucleus
Golgi apparatus
Plasma membrane
Lysosome
Centrioles
a) Identify the organelles labelled \(1\)
 
b) The main function of the organelle labelled \(1\) is