A deuterostomic animal is

Options

A. star fish
B. Sea anemone
C. Pearl oyster
D. Octopus

Answer

To determine which of the given animals is a deuterostomic animal, we can follow these steps:

### Step 1: Understand the Definition of Deuterostomic Animals
Deuterostomic animals are characterized by their embryonic development, where the anus forms before the mouth during the early stages of development. This is in contrast to protostomic animals, where the mouth develops first.

### Step 2: Identify the Phyla of the Given Animals
- **Starfish**: Belongs to the phylum Echinodermata.
- **Sea Anemone**: Belongs to the phylum Cnidaria.
- **Pearl Oyster**: Belongs to the phylum Mollusca.
- **Octopus**: Also belongs to the phylum Mollusca.

### Step 3: Determine Which Phyla are Deuterostomic
Among the phyla listed:
- Echinodermata (e.g., starfish) and Chordata (which includes vertebrates) are deuterostomic.
- Cnidaria and Mollusca are protostomic.

### Step 4: Identify the Correct Answer
Since starfish is the only animal from the deuterostomic phylum (Echinodermata), the correct answer is **A. Starfish**.

### Final Answer
A deuterostomic animal is **A. Starfish**.

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