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प्रश्न
Which of the following group of organisms are not constituents of a food chain?
- grass, lion, rabbit, wolf
- plankton, man, fish, grasshopper
- wolf, grass, snake, tiger
- frog, snake, eagle, grass, grasshopper
विकल्प
(i) and (iii)
(iii) and (iv)
(ii) and (iii)
(i) and (iv)
उत्तर
(ii) and (iii)
Explanation:
A food chain is a sequence of living organisms in a community or ecosystem, in which one organism is consumed the other.
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संबंधित प्रश्न
Give reason to justify the following: Flow of energy in a food chain is unidirectional.
What name has been given to those organisms which break down the complex organic compounds present in dead animals and plants?
Give an example of a four step food chain operating in grassland. Name the secondary consumer in this food chain
Give two differences between food chain and food web.
If a grasshopper is eaten by a frog, then the energy transfer will be from ______.
If a harmful chemical enters a food chain comprising cat, mice and plants, which one of these organisms is likely to have the maximum concentration of the harmful chemical in its body?
A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high.
(a) In which organisms the pesticides enter from the polluted water? What is this level of organisms known as?
Answer the following question.
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.
(a) Why is the maximum concentration of pesticides found in human beings?
(b) Give one method which could be applied to reduce our intake of pesticides through food to some extent.
(c) Various steps in a food chain represent :
(a) Food web
(b) Trophic level
(c) Ecosystem
(d) Biomagnification
(d) With regard to various food chains operating in an ecosystem, man is a:
(a) Consumer
(b) Producer
(c) Producer and consumer
(d) Producer and decomposer
In an ecosystem, herbivores represent ______.
What is Autotrophs?
