Assertion : Endostyle is present at the pharyngeal groove of the midventral wall of the pharynx of Amphioxus. Reason : Endostyle has an important role in respiration.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false

Assertion : Endostyle is present at the pharyngeal groove of the midve

1.	Assertion : Endostyle is present at the pharyngeal groove of the midventral wall of the pharynx of Amphioxus. Reason : Endostyle has an important role in respiration.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false
Answer» Correct Answer - C In the mid ventral wall of pharynx is a shallow groove called endostyle. The endostyle is lined with glands cells which secrets mucus. The larval endostyle is lost during metamorphosis of lamprey, it contributes to the formation of a thyroid gland in the adult. Like thyroid it concentrates radioactive iodive in itself. Similar endostyle is found in urochordate and the ammocoete larve of lampreys.