The following points highlight the two beneficial insects for us:- 1. Silk Moth 2. Lac Insect. Beneficial Insect # 1. Silk Moth: The silk moths are related to butterflies and belong to the order Lepidoptera. From the very ancient times, these insects are well-known for the ability to produce silk. The rearing of silkworm for silk originally started in China, [...]
In this article we will discuss about:- 1. Habitat and External Feature of Prawn 2. Appendages of Prawn 3. Movement 4. Alimentary System 5. Respiratory System 6. Vascular System 7. Excretory System 8. Nervous System 9. Receptor Organs 10. Reproductive System 11. Breeding and Life-History. Contents: Habitat and External Feature of Prawn Appendages of Prawn Movement of Prawn Alimentary System [...]
In this article we will discuss about the dissection of earthworm. Also learn about:- 1. The Alimentary System 2. Dissection of Nervous System 3. Dissection of Reproductive System. Earthworms are delicate animals (Fig.2.1) and need careful handling to avoid damage to internal organs. Killing: Wash the live specimens with water to get rid of mucus. Drop them in a petri [...]