Q. What is broken-down by lichen and mosses to form soil?

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Q. What is plant succession?

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Q. Which type of trees need more sunlight to produce more food?

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Q. The transfer of pollen from anther to stigma in a flowering plants is known as

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Q. Which part of the flowering plant splits open, exposing the microscopic pollen grains?

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Q. When the seeds get mature, the whole fruit fall apart from

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Q. Carbon dioxide is a green house gas which is causing

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Q. Why organism have developed a special characteristics over, which has made them to live in an unfavorable environment?

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Q. Animal and plant communities must adopt both

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Q. What flowering plants need first, before they can produce seeds?

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Q. What are the major causes of air pollution in urban areas?

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Q. Flowers with narrow, deep petal tubes, such as honeysuckle, are adopted to pollination by

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Q. What are the examples of climatic climax?

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Q. Pakistan's cultivated land is located on the alluvial plains in the

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Q. Which nutrients are occurred naturally in water and soil?

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Q. Name the major crops of Pakistan?

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Q. What kind of metal waste is harmful for human health?

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Q. The amount of land pollution depends on

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Q. What is the half life of iodine?

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Q. Urban areas are center of

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