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प्रश्न
Answer the following question:
Why do Green plants start evolving CO2 instead of O2, at high temperatures?
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
Mention any 'two' ecological services forthe benefit of mankind
Discuss the role of healthy ecosystem services as a pre-requisite for a wide range of economic, environmental and aesthetic goods and services
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 ______.
Seed dispersal in squirting cucumber occurs via ______.
Which of the following is NOT included in ecosystem services?
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 | ______ |
The unique feature of hot dilute soup is that there was no free ______ in it.
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.
