Plant species having a wide range of genetical distribution evolve into a local population known as
Assertion (A): True xerophytes store water in the form of mucilage which helps to withstand prolonged period of drought. Reason (R): Vascular and mechanical tissues are well developed in true xerophytes. The correct answer is: |
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Concept of ecological pyramids was proposed by |
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Which one of the following correctly represents an organism and its ecological niche? |
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The rate of formation of new organic matter by rabbit in a grassland, is called |
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Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct? |
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Which of the following is false? |
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Niche is defined as the |
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Which one of the following pairs in mismatched? |
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The correct sequence of plants in a hydrosere is |
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Identify the correct type of food chain : dead animal → blow fly maggots → common frog → snake |
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