Possible response:

Structural Organisation in Animals: Cockroach as an Example

Cockroach is one of the common insects that can be used as an example of structural organisation in animals. In the NEET exam, questions related to this chapter may ask you to identify the features or functions of different tissues, organs or systems in cockroach or other animals. Here are some possible topics that you can study to prepare for such questions:

1. Tissues
- Cockroach has three germ layers: ectoderm, mesoderm and endoderm, which give rise to different tissues.
- Examples of tissues in cockroach include: epidermis, cuticle, muscle, nerve, trachea, fat body, haemocytes, and sensory organs.
- These tissues have specific structures and functions that contribute to the survival of the cockroach.

2. Organs
- An organ is a group of tissues that work together to perform a specific function.
- Cockroach has several organs that are adapted to its environment and lifestyle, such as: antennae, eyes, mouthparts, salivary glands, crop, gizzard, midgut, hindgut, Malpighian tubules, reproductive system, and respiratory system.
- Each organ has its own structure and function, and is connected to other organs through various systems.

3. Systems
- A system is a group of organs that work together to perform a common function.
- Cockroach has several systems that are interdependent and essential for its survival, such as: nervous system, digestive system, excretory system, reproductive system, and respiratory system.
- Each system has its own components and functions, and is regulated by various hormones and neurotransmitters.

4. Adaptations
- Cockroach has several adaptations that enable it to live in different habitats and cope with various challenges, such as: nocturnal behaviour, rapid movement, omnivorous diet, symbiotic gut microbes, water conservation, and resistance to pesticides and pathogens.
- These adaptations are based on the structural and functional features of the cockroach's body, and are influenced by its genes and environment.

In conclusion, cockroach is a useful example of structural organisation in animals, and can be studied at different levels of complexity. By understanding the tissues, organs, systems, and adaptations of cockroach, you can gain insight into the diversity and unity of life, and appreciate the beauty and complexity of nature.

Earthworm and frog can also be asked .. it already happened . So atleast read ncert thoroughly.