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प्रश्न
Explain the term ‘producer’.
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उत्तर
A producer is an organism that prepares its own food from simple inorganic substances by the process of photosynthesis, using sunlight, carbon dioxide, and water.
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संबंधित प्रश्न
List two biotic components of a biosphere.
Why are plants called producers?
Which of the following belong to the same trophic level?
Tree ; Frog ; Snake ; Grass ; Lizard
Consider the food chain :
Grass → Deer → Lion
What will happen if all the lions are removed from the above food chain?
The sea water contains water beetles, tadpole, fish and weeds.
- Write a food chain comprising all the given organisms.
- Which organisms in the food chain are (i) herbivore, and (ii) carnivores?
- Which organisms are (i) predators, and (ii) prey?
- Which organisms can trap solar energy to make food?
- Which organism is a secondary consumer?
The following is a food chain that ends with human :
How does this food chain differ form a usual food chain involving human such as : plants → goat → human?
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Name two zooplanktons.
Give one example of a food chain having four organisms. Below each organism write the three appropriate terms from the part (a) above which you think it represents.
Name two predators of snakes in a food web operating in a forest ecosystem.
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
Name and state the law given by Lindeman which tells us how much energy entering a particular trophic level of organisms is available for trasnsfer to the next higher trophic level.
In addition to wheat plants, a crop field ecosystem has organisms such as snake, peacock, eagle and mice. If the wheat plants are sprayed with pesticides periodically, which of the following will have the minimum concentration of pesticides in the body?
(a) snake
(b) eagle
(c) mice
(d) peacock
| 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
Arrange the following in a correct sequence and form a food chain
Rabbit → Carrot → Eagle → Snake
Arrange the following in a correct sequence and form a food chain
Human → Insect → Algae → Fish
We should reduce the use of the plastic bags, bottles etc. because ______.
Green plants utilize ______ percent of sun’s energy to prepare their food by the process of photosynthesis.
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.
Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions:
- Name the type of ecosystems that exist in food chains (b) and (c).
- The first trophic level in all food chains is producers. Why? What percentage of solar energy do these producers capture for their use?
- Why are the arrows shown in the diagram in one direction only and not vice versa? Justify.
Quaternary consumers are described as:
