CBSE Questions for Class 9 Geography Natural Vegetation And Wildlife Quiz 3 - MCQExams.com

• Deodar gives yellowish brown wood. These trees are usually found in Himalayas, Punjab and Uttar Pradesh. It is the most important timber tree providing very soft wood.
  
• It is used for making cheap furniture, railway carriages, railway sleepers, packing boxes, etc.
  

Leaves of desert plants and trees are thorny and small sized. This is leaf modification of desert plants to reduce water loss by a process called transpiration.

• Tropical evergreen forests are the forests consisting of evergreen trees with green foliage throughout year. These are tropical forests.
  
• They constitute 7% of earth’s dry land area and 2% of total surface. Such forest give shelter to 50% of world’s species.
  

The indian deciduous forests are the most abundantly found among all the different types of forests in india . The indian deciduous are found in a range of landscape from the plains to the hills .

• Mangrove forests comprise of small shrubs or trees that grow in coastal saline or brackish waters. These shrubs or trees can withstand high salinity conditions.
  
• Mangrove forests of Sunderbans are largest mangrove forests of the world. Sundarbans are located in Ganga-Brahmaputra delta of West Bengal and Bangladesh.
  

Tropical monsoon climatic region is normally located between 10° and 25° North and South of the equator. In India, it extends up to 30° North latitude. Most of the trees are deciduous trees which shed all their leaves during the dry season to prevent loss of water by transpiration.

• Mangrove forest comprises of small shrubs or trees that grown in coastal saline or brackish waters. These shrubs or trees can withstand high salinity conditions. One of the example is Sundari tree after which name Sundarbans was given to this forests.
  
• Mangrove forests of Sundarbans are largest mangrove forests of the world. Sundarbans are located in Ganga-Brahmaputra delta of west Bengal and Bangladesh.
  

• Tropical rain forests can be considered as hot and wet forests. Mean monthly temperatures exceed 18 °C and average annual rainfall is above 200 cms.
  
• Tropical rainforests exhibit high levels of biodiversity. Around 40% to 75% of all biotic species are indigenous to the rainforests.
  
• These forests are found in Andaman and Nicobar Islands and Western Ghats. A part of these forests are also found in Odisha state.
  

Use of opium or poppy as a medicinal plant has been described in the ancient literature of Indian system of medicine - Ayurveda.

Primarily, purified opium is described to be the major therapeutic (for treating dysentery, diarrhea, spasms, pain etc.) component. Purification of opium has been described vividly in Ayurveda. Purified opium has been described to balance Vata and Kapha, Doshas and enhance Pitta Dosha.

In the medieval period, Avicenna, a famous Persian scholar (980-1037 AD) described uses of the opium poppy in his medical encyclopedia ‘Canon of Medicine’. Avicenna clearly described the analgesic activity of opium and explained that opium can be used to treat any type of pain due to its strong anesthetic and sedative properties.

Hence Option A is the correct answer.