Question

which is not considered an organelle?
cytoskeleton
nucleus
lysosome
mitochondria

Explanation:

Organelles are specialized structures within a cell. The nucleus, lysosome, and mitochondria are membrane - bound organelles with specific functions. The cytoskeleton is a network of protein filaments that provides structural support and is not a membrane - bound organelle in the traditional sense.

Answer:

A. Cytoskeleton