Which one of the following is not an excretory organ?
AFlame cells
BGreen glands
COmmatidia
DProtonephridia
Answer:
C. Ommatidia
Read Explanation:
Ommatidia are the individual units that make up the compound eyes of arthropods, such as insects, crustaceans, and millipedes. Each ommatidium has a lens, a cluster of photoreceptor cells, and support and pigment cells. The outside of an ommatidium is covered by a transparent cornea.
