Name the second largest phylum of animal kingdom:

Answer

**Step-by-Step Solution:**

1. **Identify the Largest Phylum**: The first step is to recognize the largest phylum in the animal kingdom, which is Phylum Arthropoda. This phylum includes insects, arachnids, and crustaceans, known for their jointed limbs and exoskeletons.

2. **Determine the Second Largest Phylum**: After identifying the largest phylum, we need to find the second largest phylum. The second largest phylum in the animal kingdom is Phylum Mollusca.

3. **Characteristics of Phylum Mollusca**:
- **Bilateral Symmetry**: Organisms in this phylum exhibit bilateral symmetry, meaning their body can be divided into two identical halves.
- **Triploblastic**: Mollusks are triploblastic, which means their body is derived from three germ layers: ectoderm, mesoderm, and endoderm.
- **Organ System Organization**: They have an organ system level of organization, which is more complex than simpler organisms.
- **Soft and Unsegmented Body**: Members of this phylum typically have a soft body that is not segmented.

4. **Examples of Phylum Mollusca**: Common examples of organisms in this phylum include snails, lobsters, and oysters.

5. **Final Answer**: Therefore, the answer to the question "Name the second largest phylum of the animal kingdom" is Phylum Mollusca.

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