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Which one is exclusively marine?...

Which one is exclusively marine?

A

Echinodermata

B

Hemichordata

C

Protochordates

D

All

Text Solution

AI Generated Solution

The correct Answer is:
To determine which option is exclusively marine, we will analyze each of the provided options step by step. ### Step 1: Analyze Echinodermata - Echinodermata is a phylum that includes organisms such as starfish and sea urchins. - They are primarily found in marine environments, but some species can also be found in brackish waters. - **Conclusion**: Echinodermata is mostly marine but not exclusively. ### Step 2: Analyze Hemichordata - Hemichordata is a phylum that includes acorn worms and pterobranchs. - These organisms are primarily marine and are found in oceanic environments. - **Conclusion**: Hemichordata is considered to be exclusively marine. ### Step 3: Analyze Protocordates - Protocordates are a group that includes organisms like tunicates and lancelets. - They are predominantly marine animals, living in oceanic waters. - **Conclusion**: Protocordates are also considered to be exclusively marine. ### Step 4: Evaluate the Options - Since both Hemichordata and Protocordates are exclusively marine, we need to consider the question's phrasing. - The question asks for an option that is exclusively marine, and since Hemichordata fits this criterion, it is the correct answer. - However, if the options include all three groups (Echinodermata, Hemichordata, and Protocordates), then the answer could be interpreted differently. ### Final Answer - The correct answer is **Hemichordata**, as it is exclusively marine.
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