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Choose the correct option for flatworms ...

Choose the correct option for flatworms -

A

Flame cells are excretory organ and osmoregulatory

B

Mostly endoparasites

C

Bisexual, internal fertilization, many larval stage

D

All

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding flatworms, we need to analyze each of the provided options carefully. ### Step-by-Step Solution: 1. **Understanding Flatworms**: Flatworms belong to the phylum Platyhelminthes. They are characterized by being unsegmented, bilaterally symmetrical, and lacking a coelomic cavity. 2. **Evaluating Option A**: - "Flame cells are their excretory organs and are osmoregulatory." - This statement is correct. Flame cells are indeed the excretory organs in flatworms, functioning in osmoregulation. 3. **Evaluating Option B**: - "They are mostly endoparasites." - This statement is also correct. Many flatworms, such as tapeworms and flukes, are endoparasites, meaning they live inside the host's body. 4. **Evaluating Option C**: - "They are bisexual, have internal fertilization, and have a larval stage." - This statement is correct as well. Flatworms are typically hermaphroditic (bisexual), engage in internal fertilization, and many species have a larval stage. 5. **Evaluating Option D**: - "All means all are correct." - Since options A, B, and C are all correct, this option is also correct. ### Conclusion: The correct answer is **Option D: All are correct**. ---
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