Fish differ from Cyclostomes due to the presence of which of the following?
[a] Fins
[b] Gills
[c] Backbone
[d] Scales

Question

Fish differ from Cyclostomes due to the presence of which of the following?
		[a] Fins		
		[b] Gills		
		[c] Backbone		
		[d] Scales

shreehari499 · Answer

What's our guess? @vita955

abhisar · Answer

Fishes belong to division Gnathosome and Cyclostomata is a class belonging to division agnatha. What's the characters of agnatha?

•	Jaws are absent in these and hence are considered as lowest grade of vertebrates.
•	Paired fins are absent (but they do have fins)

• Body is devoid of scales
• They have gills but lack operculum (gill cover)


Since, both cyclostomata and Pisces belong to eurochordate, they both have dorsal backbones.