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Form the following select the characteri...

Form the following select the characteristic features that is not correct for Balanoglossus?

A

Belongs to phylum that links non-chordates to chordates.

B

Excretory organ is proboscis gland.

C

Circulatory system is closed type.

D

Fertilisation is external.

Text Solution

AI Generated Solution

The correct Answer is:
To determine the characteristic feature that is not correct for Balanoglossus, we will analyze the provided options based on the known features of this organism. ### Step-by-Step Solution: 1. **Identify the Phylum**: Balanoglossus belongs to the phylum Hemichordata. This phylum is known to link non-chordates to chordates. Therefore, any statement claiming this is correct. **Hint**: Remember the classification of Balanoglossus and its relationship with chordates. 2. **Excretory Organ**: The excretory organ of Balanoglossus is the proboscis gland. This is a well-established fact. Thus, any statement that mentions the proboscis gland as the excretory organ is also correct. **Hint**: Think about the specific organs associated with excretion in different organisms. 3. **Circulatory System**: The circulatory system of Balanoglossus is of the open type. If any option states that the circulatory system is closed, that statement would be incorrect. **Hint**: Recall the difference between open and closed circulatory systems in various organisms. 4. **Fertilization**: Balanoglossus exhibits external fertilization, which is a correct characteristic. Any statement claiming that fertilization is external is true. **Hint**: Consider the reproductive strategies of marine organisms. 5. **Development**: The development of Balanoglossus is indirect, meaning it involves a larval stage. Any statement that mentions indirect development is also correct. **Hint**: Understand the concept of direct vs. indirect development in the life cycles of organisms. ### Conclusion: After analyzing all the statements, the incorrect characteristic feature for Balanoglossus is that its circulatory system is closed type. Therefore, the correct answer is: **Option C: Circulatory system is closed type.**
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