| 71. | The plants that grow in deserts are called – |
A. hydrophytes | |
B. mesophytes | |
C. xerophytes | |
D. epiphytes |
| 72. | The concept of ecological niche was propounded by – |
A. CC Park | |
B. Greenells | |
C. Darwin did | |
D. E. P. Odom |
| 73. | Which one of the following is the most stable ecosystem? |
A. Ocean | |
B. Forest | |
C. desert | |
D. Mountain |
| 74. | Through which man can maintain ecological balance in the biosphere? |
A. deforestation | |
B. To develop new varieties of related plants and new breeds of livestock. | |
C. use of insecticides and pesticides | |
D. Understanding the subtle balance of the relative numbers of organisms |
| 75. | Social forestry is |
A. growing a variety of plants together on private land | |
B. forest management by cooperatives | |
C. monoculture on cooperatively owned land | |
D. Cultivation and management of useful plants on co-operatively owned land |
| 76. | Earth Summit was held in – |
A. in Chicago | |
B. in Adelaide | |
C. in London | |
D. in Rio de Janeiro |
| 77. | Where is the National Botanical Garden located? |
A. Shimla | |
B. Kolkata | |
C. Lucknow | |
D. Bangalore |
| 78. | Where is the Forest Research Institute located in India? |
A. Delhi | |
B. Bhopal | |
C. Dehradun | |
D. Lucknow |
| 79. | Earth’s largest ecosystem is – |
A. biome | |
B. Water Board | |
C. lithosphere | |
D. biosphere |
| 80. | Which of the following is an artificial ecosystem? |
A. paddy field | |
B. Forest | |
C. meadow | |
D. Lake |