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प्रश्न
In a fresh water environment like pond, rooted autotrophs are
पर्याय
Nymphaea and typha
Ceratophyllum and Utricularia
Wolffia and pistia
Azolla and lemna
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उत्तर
Nymphaea and typha
संबंधित प्रश्न
Read the given statements and select the correct option.
Statement A: Cattle do not graze on weeds of Calotropis.
Statement B: Calotropis have thorns and spines, as a defense against herbivores.
In soil water available for plants is
A free-living nitrogen-fixing cyanobacterium which can also form a symbiotic association with the water fern Azolla
Sticky glands of Boerhaavia and Cleome support
Why are some organisms called as eurythermals and some others as stenohaline?
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?
Soil formation can be initiated by biological organisms. Explain how?
What is thermal stratification? Mention their types.
What is a seed ball?
What is co-evolution?
Explain Raunkiaer classification in the world’s vegetation based on the temperature.
What are the advantages of seed dispersal?
Read the following statements and fill up the blanks with the correct option.
- Total soil water content in soil is called ______
- Soil water not available to plants is called ______
- Soil water available to plants is called ______
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 |
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 |
What is the soil profile? Explain the characters of different soil horizons.
