Digestive tract in ctenophores is

Options

A. complete
B. incomplete
C. both 1) and 2)
D. none

Answer

**Step-by-Step Solution:**

1. **Understanding Ctenophores**: Ctenophores, also known as comb jellies, are marine invertebrates belonging to the phylum Ctenophora. They exhibit unique characteristics, including their method of digestion.

2. **Types of Digestion**: Ctenophores utilize both intracellular and extracellular digestion. Intracellular digestion occurs within the cells, while extracellular digestion happens outside the cells.

3. **Complete Digestive System**: A complete digestive system is characterized by the presence of both a mouth and an anus. This means that food enters the organism through the mouth and waste is expelled through the anus.

4. **Application to Ctenophores**: In ctenophores, the digestive tract is complete because it includes both a mouth for ingestion and an anus for excretion. This allows for a more efficient processing of food.

5. **Conclusion**: Therefore, the correct answer to the question about the digestive tract in ctenophores is that it is complete.

**Final Answer**: The digestive tract in ctenophores is complete.

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