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प्रश्न
Answer the following question:
Why do Green plants start evolving CO2 instead of O2, at high temperatures?
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उत्तर
It is due to photorespiration. The green cells in the presence of light, take-up oxygen and produce CO2, without yielding any useable energy.
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संबंधित प्रश्न
Answer the following question.
Mention four significant services that a healthy forest ecosystem provides.
After a fire in a forest, the pioneer stage during secondary succession is ______.
Which of the following condition favours the dissociation of oxyhaemoglobin into oxygen and deoxyhaemoglobin?
Out of the total proposed cost of various ecosystem services, the cost of climate regulations and habitat for wildlife is ______.
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 | ______ |
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.
How much water does an average maple tree release per hour during summer through transpiration?
Which organisms are identified as essential biotic agents for pollination?
What percentage of wild plant species are sustained by pollinating organisms?
