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Define the following terms:
(i) Autotrophs (ii) Heterotrophs
(iii) Decomposers (iv) Producers.
(i) Autotrophs. Organisms which can synthesis their own food by the process of photosynthesis are called autotrophs. All green plants are autotrophs.
(ii) Heterotrophs. Organisms which depend on plants or animals for their food are called heterotrophs. They cannot make their own food. All the animals are heterotrophs.
(iii) Decomposers. These are bacteria and fungi (microorganisms) which decompose dead organic matter. They depend on the dead and decaying matter for food.
(iv) Producers. These are the organisms which produce food. All green plants (autotrophs) are producers.
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What is biotic component?
Does there exist any relationship between the climate and biotic components? If yes, explain with example.
What percentage of oxygen and nitrogen is present in the air?
Name the pollutants by which industries pollute air.
How is balance of carbon dioxide and oxygen maintained in the environment?
What is the percentage of carbon dioxide in the atmosphere of Venus and Mars?
What are the two main ways in which oxygen is consumed and carbon dioxide is produced?
What are the two ways in which carbon dioxide is fixed to keep its percentage almost constant?
What is the role of the atmosphere in climate control?
What are the two factors that cause changes in our atmosphere?
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