In cockroach, a pair of antennae arises from membranous socket: Antennae are

Options

A. Without any sensory receptors
B. Many segmented
C. Sensory receptors that help in monitoring the environment
D. b and c are correct

Answer

### Step-by-Step Text Solution:

1. **Understanding the Structure of Antennae in Cockroaches**:
- In cockroaches, antennae are a pair of sensory appendages that arise from a membranous socket on the head. They are segmented structures that play a crucial role in the cockroach's interaction with its environment.

2. **Function of Antennae**:
- The primary function of the antennae is to serve as sensory receptors. They help the cockroach detect various environmental stimuli such as changes in weather, climate, and pH levels.

3. **Sensory Capabilities**:
- Antennae are equipped with sensory receptors that allow cockroaches to sense vibrations, which can indicate the presence of predators or other environmental changes. This sensory input is vital for their survival, helping them to navigate their surroundings and find food.

4. **Segmentation of Antennae**:
- The antennae of cockroaches are segmented, which increases their surface area and allows different segments to perform various sensory functions. This segmentation is essential for enhancing their ability to monitor the environment effectively.

5. **Conclusion**:
- Therefore, the antennae in cockroaches are not only segmented but also equipped with sensory receptors that help them monitor their environment, making them crucial for survival.