Question

organelles
which is not considered an organelle?
nucleus
cytoskeleton
mitochondria
lysosome

Explanation:

Organelles are specialized structures within a cell. The nucleus is the control - center, mitochondria are the power - houses, and lysosomes are the waste - disposal units. The cytoskeleton provides structural support but is not a membrane - bound organelle like the others.

Answer:

Cytoskeleton