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Protochordates are exclusively...

Protochordates are exclusively

A

freshwater

B

marine

C

both (1) and (2)

D

terrestrial

Text Solution

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The correct Answer is:
To solve the question regarding the habitat of protochordates, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Group**: Understand that protochordates belong to the phylum Chordata, which includes animals that possess a notochord, a nerve cord, and pharyngeal gill slits at some stage of their development. 2. **Classify Protochordates**: Recognize that protochordates are further divided into two subphyla: Urochordata (tunicates) and Cephalochordata (lancelets). These groups are characterized by their primitive chordate features. 3. **Determine Habitat**: Research the habitat preferences of protochordates. It is known that both Urochordata and Cephalochordata are primarily found in marine environments. 4. **Evaluate Options**: The question provides options: freshwater, marine, both, or terrestrial. Based on the known habitat of protochordates, they are exclusively marine. 5. **Select the Correct Answer**: Conclude that the correct answer is that protochordates are exclusively marine. ### Final Answer: Protochordates are exclusively marine. ---
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