alleryStart learning →The endostyle of filter-feeding chordates is thought to be a precursor of which vertebrate gland?
AThyroid gland
BPituitary gland
CThymus gland
DAdrenal gland
Answer & Solution
Correct answer: A. Thyroid gland
The endostyle stores iodine and secretes mucus, and it is considered a precursor of the vertebrate thyroid.
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