Question

the origin of placoid scles is only
a. only ectodermal
b.only endodermal
c.only mesodermal
d.both meso and ectodermal​

Answer 1

Answer:

c is the correct answer.

Answer 2

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Oɴʟʏ Mᴇsᴏᴅᴇʀᴍᴀʟ