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In a fresh water environment like pond, rooted autotrophs are
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Strong, sharp spines that get attached to animal’s feet are found in the fruits of
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Sticky glands of Boerhaavia and Cleome support
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Why are some organisms called as eurythermals and some others as stenohaline?
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The organic horizon is generally absent from agricultural soils because tilling, e.g., plowing, buries organic matter. Why is an organic horizon generally absent in desert soils?
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Soil formation can be initiated by biological organisms. Explain how?
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Sandy soil is not suitable for cultivation. Explain why?
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Describe the mutual relationship between the fig and wasp and comment on the phenomenon that operates in this relationship.
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What is thermal stratification? Mention their types.
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What is myrmecophily?
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What is a seed ball?
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Explain Raunkiaer classification in the world’s vegetation based on the temperature.
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Explain different types of hydrophytes with examples.
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What are the advantages of seed dispersal?
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Describe the dispersal of fruit and seeds by animals.
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Identify the A, B, C, and D in the given table
| Interaction | Effects on species X | Effects on species Y |
| Mutualism | A | (+) |
| B | (+) | (-) |
| Competition | (-) | C |
| D | (-) | 0 |
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Column I represent the size of the soil particles and Column II represents the type of soil components. Which of the following is the correct match for the Column I and Column IL
| Column - I | Column - II | ||
| I) | 0.2 to 2.00 mm | i) | Slit soil |
| II) | Less than 0.002 mm | ii) | Clayey soil |
| III) | 0.002 to 0.02 mm | iii) | Sandy soil |
| IV) | 0.002 to 0.2 mm | iv) | Loamy soil |
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What is the soil profile? Explain the characters of different soil horizons.
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Explain afforestation with case studies.
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The total number of nitrogenous bases in human genome is estimated to be about ____________.
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