In Protochordates, the endostyle is a ciliated groove in the pharynx. It is considered homologous to which vertebrate organ?
Show answer and explanation
Correct answer: Thyroid gland (iodine-binding endocrine organ)
The endostyle secretes mucus to trap food particles and also concentrates iodine. In higher vertebrates, this structure has evolved into the thyroid gland, which regulates metabolism.
Practice all 20 Chordata: Protochordata to Amphibia questions
Keep practicing
More Chordata: Protochordata to Amphibia questions
- Which of the following is a primary characteristic that distinguishes Urochordata (Tunicates) from other protochordates?
- In Cephalochordates like Branchiostoma (Amphioxus), what is the extent of the notochord?
- Which of the following organisms belongs to the Class Agnatha and is known for its parasitic lifestyle, attaching to fish with a suctorial…
- The 'Ammocoete' larva is a significant developmental stage of which vertebrate group?
- What is the primary skeletal difference between the Class Chondrichthyes and the Class Osteichthyes?
- Which sensory organ in sharks is specifically adapted to detect weak electrical fields generated by prey?