Question

Which among the following is incorrect about Hemichordata?

(a) They have three main parts in their body, namely, Proboscis, Collar and a long trunk

(b) Open circulatory system is present in these organisms

(c) Excretion takes place through proboscis gland

(d) Hemichordates are organisms that contain notochord like chordates but lack in all other features

I have been asked this question during an interview.

My question is from Classification of Animal Kingdom into Different Phylum-4 topic in section Animal Kingdom of Biology – Class 11

Answer 1

The correct answer is (d) Hemichordates are organisms that contain notochord like chordates but lack in all other features

The explanation: Hemichordates have three main parts in their body, namely, Proboscis, Collar and a long trunk. Open circulatory system is present in these organisms. Excretion takes place through proboscis gland. Hemichordates don’t have a notochord instead have a structure similar to notochord called as stomochord.