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प्रश्न
Give an example of a four step food chain operating in grassland. Name the secondary consumer in this food chain
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उत्तर
Grass → Insect → Frog → Eagle
The secondary consumer in this food chain is the frog.
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संबंधित प्रश्न
Which of the following are always at the second tropic level of food chains?
What will happen if we kill all the organisms in one trophic level?
Which of the following belong to the same trophic level?
Tree ; Frog ; Snake ; Grass ; Lizard
What is the role of decomposers in the ecosystem?
What is a food chain?
Which of the following are decomposers of dead organisms?
| Bacteria | Fungi | Viruses |
| (a) no | yes | yes |
| (b) yes | no | yes |
| (c) yes | yes | no |
| (d) yes | yes | yes |
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms are (i) predators, and (ii) prey?
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms can trap solar energy to make food?
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Name two zooplanktons.
Explain how harmful chemicals enter our bodies.
'If we excessively use pesticides to protect the crops from diseases, then it may cause long-term damage to mankind'. Justify this statement.
| Human body is made up of five important components, of which water is the main component. Food, as well as potable water, are essential for every human being. The food is obtained from plants through agriculture. Pesticides are being used extensively for a high yield in the fields. These pesticides are absorbed by the plants from the soil along with water and minerals and from the water bodies these pesticides are taken up by the aquatic animals and plants. As these chemicals are not biodegradables, they get accumulated progressively at each trophic level. The maximum concentration of these chemicals gets accumulated in our bodies and greatly affects the health of our mind and body. |
- Why is the maximum concentration of pesticides found in human beings? (1)
- Give one method which could be applied to reduce our intake of pesticides through food to some extent. (1)
- Various steps in a food chain represent: (1)
- Food web
- Trophic level
- Ecosystem
- Biomagnification
- With regard to various food chains operating in an ecosystem, man is a: (1)
- Consumer
- Producer
- Producer and consumer
- Producer and decomposer
What are decomposers? What will be the consequence if the decomposers are completely eradicated from an ecosystem? Give justification in support of your answer.
Food chains are very important for the survival of most species.
If 10,000 J solar energy falls on green plants in a terrestrial ecosystem, what percentage of solar energy will be converted into food energy?
Food chains are very important for the survival of most species.
Matter and energy are two fundamental inputs of an ecosystem. Movement of:
Each level in the food chain is called a ______ level.
Animals that eat both plants and animals are called as Carnivores.
Which statement is correct with respect to the food chain?
If a harmful chemical enters a food chain comprising peacocks, plants, rats and snakes, which of these organisms is likely to have the highest concentration of the chemical in its body? Justify your answer. Name the process involved and define it.
