Question

which of the following structures is not found in every type of cell according to modern cell theory? d) ribosomes c) mitochondria b) cytoplasm a) plasma membrane

Explanation:

All cells have a plasma membrane (encloses cell), cytoplasm (gel-like substance), and ribosomes (protein synthesis). Mitochondria are only in eukaryotic cells (not prokaryotes like bacteria), so they are not universal.

Answer:

C) Mitochondria