Silkworm is differed from prawn and scorpion in having of :-

Options

A. Jointed appendages
B. Biramous appendages
C. Three pair of legs
D. Open circulation

Answer

To solve the question of how the silkworm differs from prawn and scorpion, we need to analyze the characteristics of these organisms.

### Step-by-Step Solution:

1. **Identify the Organisms**:
- Silkworm: An insect belonging to the class Insecta within the phylum Arthropoda.
- Prawn: A crustacean, also part of the phylum Arthropoda, belonging to the class Malacostraca.
- Scorpion: An arachnid, also within the phylum Arthropoda, belonging to the class Arachnida.

2. **Examine the Options**:
- **Jointed Appendages**: All three organisms have jointed appendages, which is a characteristic of arthropods.
- **Birameous Appendages**: This refers to appendages that are branched into two parts, typically found in some crustaceans, but not a distinguishing feature for silkworm.
- **Three Pairs of Legs**: Insects, including silkworms, have three pairs of legs (totaling six legs). In contrast, prawns have five pairs of legs, and scorpions have four pairs of legs (totaling eight legs).
- **Open Circulation**: Both silkworms and prawns have an open circulatory system, which is common among arthropods.

3. **Determine the Correct Answer**:
- The key distinguishing feature here is the number of legs. Silkworms have three pairs of legs, while prawns have five pairs and scorpions have four pairs. Therefore, the correct answer is that silkworms differ from prawns and scorpions in having three pairs of legs.

### Final Answer:
Silkworm is differed from prawn and scorpion in having three pairs of legs.

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