70) Consider the following statements:
1. The Himalayan vegetation varies according to both altitude and climatic conditions
2. There are mainly two types of tropical forests that are found in the Himalayas--the tropical rain forests and the trop

71) The chief imports of Australia is?

72) Penicillin acts on-

73) Which of the following statements regarding red soils of India is/are correct?
1. The colour of the soil is red due to ferric oxide content.
2. Red soils are rich in lime, humus and potash.
3. They are porous and have friable structure.