Multiple choice Which of the following do not belong to connective tissue? Fibroblasts Adipose cells Macrophages Prokaryotic cells Mast cells Reveal answer Fill a bubble to check yourself D Correct answer Explanation This is the correct option. Prokaryotic cells are not connective tissues. A prokaryote is a single-celled organism that lacks a membrane-bound nucleus, mitochondria, or any other membrane-bound organelles.