Which of the following cannot be considered as characteristic feature of arthropods?

Options

A. Jointed appendages
B. Direct development
C. Schizocoelom
D. Bilateral symmetry

Answer

To determine which of the following cannot be considered a characteristic feature of arthropods, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Arthropods**: Arthropods are a diverse group of invertebrates that include insects, arachnids, myriapods, and crustaceans. They are known for certain key characteristics.

2. **Option Analysis**:
- **Jointed Appendages**: This is a defining characteristic of arthropods. They possess jointed limbs (appendages) such as legs and antennae. Therefore, this cannot be the answer.

- **Direct Development**: This refers to a developmental process where the young resemble the adults and do not go through a larval stage. Most arthropods undergo indirect development, where they have larval stages (e.g., caterpillars in insects). Thus, this is likely the correct answer to the question.

- **Schizocoelom**: This term refers to a type of body cavity formation that occurs through the splitting of mesodermal tissue. Schizocoelom is indeed found in arthropods, so this cannot be the answer.

- **Bilateral Symmetry**: Arthropods exhibit bilateral symmetry, meaning their body can be divided into two equal halves along a single plane. This is a characteristic feature of arthropods, so this cannot be the answer.

3. **Conclusion**: After analyzing all the options, the characteristic that cannot be considered a feature of arthropods is **Direct Development**.

### Final Answer:
**Direct Development** cannot be considered a characteristic feature of arthropods.

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