मराठी

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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पाठ 5: Our Environment - Exercise 1 [पृष्ठ २७०]

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लखमीर सिंह Biology Part 3 [English] Class 10
पाठ 5 Our Environment
Exercise 1 | Q 48. | पृष्ठ २७०

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संबंधित प्रश्‍न

"Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to contain varying amounts of pesticide residues." State the reason to explain how and why it happens?


What are trophic levels? Give an example of a food chain and state the different trophic levels in it.


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


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


Write down a food chain with five links in it.


At which trophic level a person is feeding when he is eating bread.


Write one or two word for the following statement/definition :

Organisms which depend on the producers for food either directly or indirectly


What is a food chain?


In the food chain comprising of a snake, grass, insect, and frog, the secondary consumer is :
(a) insect
(b) snake
(c) frog
(d) grass


A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y

Which organism in the above food chain is a (1) primary consumer, and (2) tertiary consumer?


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


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.


Fill in the following blank with suitable word :

 Grass → ........... → Human


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.


If the energy available at the producer level in a food chain is 150 J, how much energy will be transferred to : tertiary consumer?
(a) 15 J
(b) 10 J
(c) 1.50 J
(d) 0.15 J


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.                                             

Which organism will have the maximum amount of pesticides accumulated through the food chain? What is this process known as?


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) 
    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)
    1. Consumer
    2. Producer
    3. Producer and consumer
    4. Producer and decomposer

The sequence of who eats whom in an ecosystem is called as ______.


The food chain begins with the energy given by the ______.


In the following food chain, vertical arrows indicate the energy lost to the environment and horizontal arrows indicate energy transferred to the next trophic level. Which one of the three vertical arrows (A, C and E) and which one of the two horizontal arrows (B and D) will represent more energy transfer? Give reason for your answer.

A food chain in a forest ecosystem


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