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प्रश्न
Mention any 'two' ecological services forthe benefit of mankind
उत्तर
Ecological services for the benefit of mankind are CO2 fixation and release of oxygen.
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संबंधित प्रश्न
Answer the following question:
Why do Green plants start evolving CO2 instead of O2, at high temperatures?
After a fire in a forest, the pioneer stage during secondary succession is ______.
Seed dispersal in squirting cucumber occurs via ______.
Which of the following condition favours the dissociation of oxyhaemoglobin into oxygen and deoxyhaemoglobin?
Which of the following is NOT included in ecosystem services?
Ecosystem is not accepted by which law of thermodynamics?
Classify the following to form Column B as per the category given in Column A:
(Nature trails, Pollination, Sea food, Carbon sequestration, Animal therapy, Pest control, Health care, Nutrient cycling.)
| Column A | ColumnB | |
| (1) | Supporting services | ______ |
| (2) | Provisioning services | ______ |
| (3) | Regulating services | ______ |
| (4) | Cultural services | ______ |
Primary production is expressed in terms of ______.
Based on the table given below, identify the type of natural selection taking place.
| Size of the seeds | % of germination |
| Small | 75% |
| Medium | 15% |
| Large | 75% |
Given below are the features of Seed A and Seed B. Study them carefully and answer the question that follows.
| SEED A | Papery endosperm, swollen cotyledon, perisperm develops from nucellus, suspensor, haustoria substitute endosperm. |
| SEED B | Swollen endosperm, papery cotyledons or absent, perisperm does not develop from nucellus, suspensor and haustoria do not substitute endosperm. |
Identify the type of Seed A and Seed B. Cite one example of each of Seed A and Seed B.
