हिंदी

Which of the Following Represents a Possible Food Chain Found in a Pond :Primary Producers Primary Consumers Secondary Consumers Green Algae Fish Mosquito Larvae

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प्रश्न

Which of the following represents a possible food chain found in a pond :

Primary
producers
Primary consumers Secondary
consumers
(a) green algae fish mosquito larvae
(b) fish green algae mosquito larvae
(c) mosquito larvae fish green algae
(d) green algae mosquito larvae fish

 

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उत्तर

green algae, mosquito larvae, fish
In a pond, green algae are the primary producers. Green algae are consumed by mosquito larvae, which therefore become the primary consumers. Mosquito larvae are consumed by fish, which then become the secondary consumers.

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अध्याय 5: Our Environment - Exercise 1 [पृष्ठ २२८]

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लखमीर सिंग Biology Part 3 [English] Class 10
अध्याय 5 Our Environment
Exercise 1 | Q 48 | पृष्ठ २२८

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संबंधित प्रश्न

In a food chain of frog, grass, insect and snake, assign trophic level to frog.


We do not clean natural ponds or lakes but an aquarium needs to be cleaned regularly. Why is it so ? Explain.


What name has been given to those organisms which break down the complex organic compounds present in dead animals and plants?


The following statement is true or false :

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What will happen if we kill all the organisms in one trophic level?


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What is a food chain?


Give one example of a simple food chain.


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Which organisms are (i) predators, and (ii) prey?


What is meant by bioconcentration of pesticides


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(a) snake
(b) eagle
(c) mice
(d) peacock


"Energy flow in food chains is always unidirectional". Justify this statement. Explain how the pesticides enter a food chain and subsequently get into our body.

 

 

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.
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  2. Give one method which could be applied to reduce our intake of pesticides through food to some extent.  (1)
  3. Various steps in a food chain represent:  (1) 
    1. Food web
    2. Trophic level
    3. Ecosystem
    4. Biomagnification
  4. With regard to various food chains operating in an ecosystem, man is a:   (1)
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    2. Producer
    3. Producer and consumer
    4. Producer and decomposer

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Observe the food web and answer the questions given below:

Why do all food chains start with plants?


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