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| # | Question | Subject and topic | Difficulty |
|---|---|---|---|
| 1701 | Which of these is a man-made ecosystem? | Biology/Biological Studies/Biotechnology/Biochemistry Structure and function of ecosystems |
Easy |
| 1702 | In a pond, decomposers such as fungi and bacteria are most abundant | Biology/Biological Studies/Biotechnology/Biochemistry Structure and function of ecosystems |
Medium |
| 1703 | Which statement about the functioning of an ecosystem is correct? | Biology/Biological Studies/Biotechnology/Biochemistry Structure and function of ecosystems |
Medium |
| 1704 | A student sets up a sealed glass aquarium with water plants, snails and microbes and keeps it in the dark for… | Biology/Biological Studies/Biotechnology/Biochemistry Structure and function of ecosystems |
Hard |
| 1705 | Net primary productivity is equal to | Biology/Biological Studies/Biotechnology/Biochemistry Productivity and decomposition |
Easy |
| 1706 | The dark, amorphous, nutrient-rich substance formed during decomposition that is very resistant to microbial … | Biology/Biological Studies/Biotechnology/Biochemistry Productivity and decomposition |
Easy |
| 1707 | A grassland has a gross primary productivity of 1500 kcal m⁻² yr⁻¹, and the plants lose 400 kcal m⁻² yr⁻¹ in … | Biology/Biological Studies/Biotechnology/Biochemistry Productivity and decomposition |
Medium |
| 1708 | During decomposition, water-soluble nutrients move down into the soil and get precipitated as unavailable sal… | Biology/Biological Studies/Biotechnology/Biochemistry Productivity and decomposition |
Medium |
| 1709 | Leaf litter from two trees is left on the forest floor. Litter X is rich in lignin; litter Y is rich in nitro… | Biology/Biological Studies/Biotechnology/Biochemistry Productivity and decomposition |
Hard |
| 1710 | Approximately what fraction of photosynthetically active radiation is captured by plants? | Biology/Biological Studies/Biotechnology/Biochemistry Energy flow |
Easy |
| 1711 | The food chain that begins with dead organic matter is called | Biology/Biological Studies/Biotechnology/Biochemistry Energy flow |
Easy |
| 1712 | The mass of living material present at a trophic level at a particular time is called | Biology/Biological Studies/Biotechnology/Biochemistry Energy flow |
Medium |
| 1713 | Producers in a grassland fix 20,000 J of energy. Using the 10 per cent law, how much energy reaches the secon… | Biology/Biological Studies/Biotechnology/Biochemistry Energy flow |
Medium |
| 1714 | Food chains in nature rarely have more than four or five trophic levels. The main reason is that | Biology/Biological Studies/Biotechnology/Biochemistry Energy flow |
Hard |
| 1715 | Which ecological pyramid is always upright, whatever the ecosystem? | Biology/Biological Studies/Biotechnology/Biochemistry Ecological pyramids |
Easy |
| 1716 | The pyramid of biomass in a sea is generally inverted because | Biology/Biological Studies/Biotechnology/Biochemistry Ecological pyramids |
Easy |
| 1717 | A single large tree supports thousands of caterpillars, which are eaten by a few birds. The pyramid of number… | Biology/Biological Studies/Biotechnology/Biochemistry Ecological pyramids |
Medium |
| 1718 | Which is a limitation of ecological pyramids? | Biology/Biological Studies/Biotechnology/Biochemistry Ecological pyramids |
Medium |
| 1719 | In an ecosystem, the energy available is 10,000 J at the producer level. Assuming 10 per cent transfer, what … | Biology/Biological Studies/Biotechnology/Biochemistry Ecological pyramids |
Hard |
| 1720 | Variation in the concentration of reserpine in Rauwolfia vomitoria growing in different Himalayan ranges is a… | Biology/Biological Studies/Biotechnology/Biochemistry Biodiversity: concept and patterns |
Easy |