1. What Is a Truffle Mushroom?
- Truffle mushrooms are rare and one of the most expensive mushrooms.
 
- These mushrooms grow in forests under oak and birch trees. They have an earthy smell and pungent taste.
 
- Due to their musky and nutty flavour, they are used in various dishes and consumed raw.
 

2. What Is Manuka Honey?
- Manuka honey is more nutritious than ordinary honey. It is extracted from the manuka tree, which is native to New Zealand.
 
- The consistency of manuka honey is thicker than ordinary honey.
 
- This honey has antibacterial properties and helps in wound healing. It also soothes sore throat and digestive issues.
 

3. What Is Biogas? How Is Biogas Produced?
- Biogas is an eco-friendly, biodegradable energy source produced from decomposing animal and plant waste.
 
- Microorganisms digest organic matter in the absence of oxygen.
 
- Biogas, also known as biomethane, is used as a vehicle and cooking fuel.
 

4. What Are Swamp Forests?
- Forests flooded with fresh water to salt water either permanently or seasonally are called swamp forests.
 
- Swamp forests can be categorized into freshwater swamp forests and saline water swamp forests.
 
- Example Myristica swamp, Nelapattu Bird sanctuary.
 

5. Name Four Medicinal Plants and Write Their Uses.
The names of four medicinal plants and their uses are given below:
| Medicinal plants | 
Uses | 
| Brahmi | 
Treats mental fatigue, anxiety and stress. | 
| Bael | 
Treats constipation. | 
| Bhringaraj | 
It promotes hair growth and has anti-inflammatory properties. | 
| Tulsi | 
It acts as a natural blood purifier and cures fever, cough and cold. | 
 
6.What Is Latex? Write Its Uses.
- Latex is a milky white thick liquid found in some flowering plants.
 
- Latex is a mixture of various substances like fats, wax, gums, water, salt, tannin, enzymes etc.
 
- This fluid is considered an excretory material which is abundantly found in stems.
 
- Rubber, fig and mulberry trees produce latex.
 
- Latex makes rubber materials like balloons, gloves, rubber balls, bandages etc.
 
