What is correct?

Options

A. Blue-green alga is a kindof fungus.
B. Sea Horse is related to Dolphin.
C. Maiden Hair Tree is an angiosperm.
D. Sea Lily is an echinoderm

Answer

To determine which statement is correct among the options provided, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyze Option A**:
- The statement claims that "Blue-green algae is a kind of fungus."
- Blue-green algae are actually known as cyanobacteria, which are photosynthetic bacteria, not fungi. They obtain energy through photosynthesis.
- **Conclusion**: This option is incorrect.

2. **Analyze Option B**:
- The statement claims that "Seahorse is related to dolphin."
- Seahorses belong to the genus Hippocampus and are classified as marine fish. Dolphins, on the other hand, belong to the class Mammals. Therefore, seahorses and dolphins are not closely related.
- **Conclusion**: This option is also incorrect.

3. **Analyze Option C**:
- The statement claims that "Madden hair tree is an angiosperm."
- The Madden hair tree is actually a living fossil that belongs to the Ginkgo family, specifically Ginkgo biloba, which is not an angiosperm but a gymnosperm.
- **Conclusion**: This option is incorrect as well.

4. **Analyze Option D**:
- The statement claims that "Sea lily is an echinoderm."
- Sea lilies are indeed classified under the phylum Echinodermata. They have both an exoskeleton and an endoskeleton, which are characteristic features of echinoderms.
- **Conclusion**: This option is correct.

### Final Answer:
The correct statement is **Option D: Sea lily is an echinoderm.**

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