1) Tropical Evergreen: Ebony, Rosewood
Monsoon or Deciduous: Teak, Eucalyptus, Sandalwood
Desert: Khajuri, Babul
Littoral or Tidal: Casuarina
Mountain: Chir Pine
2) Due to heavy rain, high temperatures and humidity, the soil retains moisture even after the rainy season. Places near the Equator get rain practically everyday. There is thick undergrowth of leaves and trees. The trees grow tall with thick foliage.
3) Mahogany: It is a hard wood used for furniture.
Rosewood: It is a fine grained, hard wood used for making expensive furniture.
Ebony: It is a hard wood, coal black, with high density. It is therefore heavy, strong and used for furniture.
Cinchona: From this Quinine is obtained which is used for treatment of malaria.
Bamboo: It is used for house construction.
4) Monsoon forest is the name given to the deciduous forest region. These regions have moderate rain, 100-200 cm. The characteristic of these trees is that they shed their leaves in the dry season to protect against excessive evaporation.
5) Deciduous trees. Teak is the most valuable. The trees of the monsoon forests are very valuable because they are hard, durable and useful in construction work and furniture. Hence the government has declared them as 'reserves' to prevent the cutting down of trees.
6) The mangrove tree has stilt like supporting roots which get exposed in low tide. The wood of this tree is hard, durable and is used for boat building and fuel.
7) Two characteristics of Deciduous Monsoon Forests are:
(i) The trees in these forests shed their leaves from six to eight weeks during spring and early summer.
(ii) The trees in these forests occur in pure stand which makes it suitable for commercial exploitation.
8) Two characteristics of Tropical rain forest:
(i) Trees are dense and evergreen.
ii) They are found in mixed stands.
9) They have long tapering roots which go deep to tap water. The trees are stunted as there is not enough rain for tree growth. The thorny branches reduce loss of water by transpiration. The fleshy leaves prevent loss of water by evaporation. The wax on the leaves closes pores.
10) The coconut is put to various uses The fruit is eaten. Oil is prepared from the seed. The oil cakes are used as manure and cattle feed. The fibres are used for making ropes. The leaves are used in thatched roofs. The bark of the tree is hard and is used in roofing, construction of houses.
11) Every part of the plant is useful. The leaves are used for making bags and mats. The fruit is eaten. The fibres are used for making ropes and the trunk supplies wood for furniture and tent pegs.
12) Kashmir Valley: Chennar and Silver Fir. They are soft wooded trees. Chennar is known for its vastness like the Banyan in the Gangetic Plain. Silver Fir is soft-wooded and is used in packing cases.
Dandakaranya: Teak and Sal. These are hard wooded trees known for their durability. Teak is used in construction work and furniture. Sal is used in railway sleepers.
13) (i) They influence the climate.
(ii) Prevent floods
(iii) They provide the natural habitat for the animals.
(iv) They provide the raw material for a number of industries, sports, paper, medicines.
(v) They are a source of employment to crores of our people.
(vi) They help in agriculture.
(vii) They prevent erosion by wind.
14) Wood pulp, paper, medicines, paints and varnishes. Forests moderate the climate by absorbing much of the sun's insolation and by supplying water vapour which further condenses to impart rain. This contributes towards cooling the hot environment of iron and steel cities.