Which of the following statements is NOT true | vedclass

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(C) Hemichordates were previously considered a sub-phylum under Phylum Chordata,but they are now placed as a separate phylum. They are $NOT$ protochor

Vedclass · Accepted Answer

The circulatory system is simple and closed type.

Vedclass · Answer

(C) Hemichordates were previously considered a sub-phylum under Phylum Chordata,but they are now placed as a separate phylum. They are $NOT$ protochordates because they lack a true notochord; they possess a 'stomochord' which is a rudimentary structure. The digestive tract is complete and straight. The circulatory system is of the open type,not closed. Excretion occurs through the proboscis gland. Therefore,statements $A$ and $C$ are technically incorrect,but in the context of standard biology questions,the circulatory system being 'closed' is a definitive error as it is 'open'.

Which of the following statements is $NOT$ true for Hemichordata?

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