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What are not true? a. Dermal scales of...

What are not true?
a. Dermal scales of fishes form the exoskeleton
b. cycloid and ctenoid scales have distinct lines of growth which aid in determining the age of the fish.
c. Fish scales are never shed.
d. The skin in elasmobranchs is covered with placoid scales.
e. The development of a placoid sale is not like the development of a tooth

A

a,b,c and e

B

b,cand e

C

c,d and e

D

only e

Text Solution

Verified by Experts

The correct Answer is:
D
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