OnlineCBT
Biology · ANIMAL KINGDOM
हिन्दीHemichordates were previously classified as a subphylum under Chordata. Why were they reclassified under Non-Chordata, and what structure was mistakenly identified as a true notochord?
Correct answer · Option 1
They lack a true notochord and possess a rudimentary stomochord in the collar region
Explanation
Hemichordates have a rudimentary structure in the collar region called stomochord, which is structurally distinct from a true notochord. Hence, they are placed as a separate phylum under Non-Chordata.
