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प्रश्न
Explain the terms 'producer' and 'consumer'. Give two examples of producers and two of consumers.
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उत्तर
Organisms that produce their own food from simple inorganic substances such as water and carbon dioxide are called producers. Examples are green plants and blue-green algae.
Organisms that consume the food prepared by producers are called consumers. Examples are cows and human beings.
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संबंधित प्रश्न
List two important roles play in the environment by decomposers.
The following statement is true or false :
Secondary consumers and tertiary consumers, both are carnivores.
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Rats, Plants, Hawk, Snakes
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Draw the food chain with four trophic levels.
The decomposers in an ecosystem ______.
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phytoplankton → zooplankton → X → Y
Name one phytoplankton.
Write the percentage of energy transferred from autotrophs to the next level in a food chain.
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What is ten per cent law? Explain with an example.
Consider the following food chain
(i) Plants → Mice → Snakes → Hawks
(ii) Plants → Mice →Hawks
If energy available at the producer level in both the food chains is 100 J, in which case will hawks get more energy as food and by how much? Justify your answer.:
How much energy will be available to hawks in the food chain comprising hawk, snake, paddy and mice, if 10,000 J of energy is available to paddy from the sun?
The ten per cent law is associated with
(a) transfer of energy from various trophic levels to decomposers in a food chain
(b) transfer of ATP energy into muscular energy
(c) transfer of chemical energy from one organism to another
(d) transfer of sun's energy to the organisms called producers.
The harmful chemical which is accumulating in human beings through food chain is :
(a) benzenehexachloride
(b) dichlorodiphenyltrichloroethane
(c) chlorofluorocarbon
(d) abscisic acid
The food chain begins with the energy given by the ______.
Use of several pesticides which results in excessive accumulation of pesticides in rivers of ponds, is a matter of deep concern. Justify this statement.
Which of the following statements is correct?
