मराठी

Which of the Following Limits the Number of Trophic Levels in a Food Chain? (A) Insufficient Food Supply from Producer Level (B) Decrease in Energy at Higher Trophic Levels - Science

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प्रश्न

Which of the following limits the number of trophic levels in a food chain?
(a) insufficient food supply from producer level
(b) decrease in energy at higher trophic levels
(c) increase in the number of organisms at higher trophic levels
(d) accumulation of harmful chemicals at higher trophic levels

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उत्तर

Decrease in energy at higher trophic levels
According to the 10 per cent law, the amount of energy decreases in each trophic level, and hence the number of trophic levels in a food chain is limited.

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पाठ 5: Our Environment - Exercise 2 [पृष्ठ २४२]

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लखमीर सिंह Biology (Science) [English] Class 10
पाठ 5 Our Environment
Exercise 2 | Q 42 | पृष्ठ २४२

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संबंधित प्रश्‍न

Which of the following belong to the same trophic level?
Goat ; Spider ; Plants ; Hawk ; Rat

 

Write an aquatic food chain.


Name the organisms belonging to the second and the fourth trophic levels in the food chain comprising the following :
Frogs, Plants, Snakes, Hawk, Insects


What are the various steps of food chain called?


A food chain represents a unidirectional flow of X. What is X?


Write a common food chain of a pond ecosystem having four links.


What would happen to the number of rabbits and grass plants if the number of foxes increased?


If 5 joules of energy is available at producer level (plants), then how much energy will be transferred to the lion in the following food chain?
Plants → Goat → Lion


The following statement is true or false :
Only 10 per cent of the light energy given by the sun is available for transfer at each higher trophic level in a food chain.


Name two predators of snakes in a food web operating in a forest ecosystem.


 Explain why, a food chain usually cannot have more than three or four steps.


A food chain comprises of cat, seed-eating bird, plants, and dog. The organism which will have the maximum concentration of harmful pesticides coming through the food chain is most likely to be :
(a) cat
(b) plants
(c) dog
(d) seed-eating bird


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.

  1. Why is the maximum concentration of pesticides found in human beings?  (1)
  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. Food web
    2. Trophic level
    3. Ecosystem
    4. Biomagnification  (1)
  4. With regard to various food chains operating in an ecosystem, man is a:
    1. Consumer
    2. Producer
    3. Producer and consumer
    4. Producer and decomposer  (1)

Give some examples for Biodegradable and Non-biodegradable waste.

S. No. Biodegradable waste Non-biodegradable waste
1. Food Waste Plastic Bottles
2.    
3.    
4.    
5.    

In a given food chain if the amount of energy at the fourth trophic level is 6 kJ, what will be the energy available at the producer level?


______ are organisms that are able to produce their own organic food.


What is Autotrophs?


What will happen if deer is missing in the food chain given below?

Grass → Deer → Tiger


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