81. The unit of pressure most commonly found on a surface weather map is:
82. All forms of water that comes down on Earth, including rain, snow, hail etc. is known as _____________
83. When both partners are affected negatively the nature of interaction is
84. Which of the following weather elements always decreases as we climb upward in the atmosphere?
85. In recycling of mineral elements within an ecosystem, the responsible direct acing organism are called
86. The formation of a climax community from an abandoned farm land is a an example of
87. Which of the following groups is absolutely essential functional component of the ecosystem?
88. Which of the following zones in a lake suffers from lack of light and therefore limited photosynthesis is able to take place?
89. _________ is mixed with petrol for being used in automobiles.
90. Energy transformation through the food chain is
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