An organism that manufactures its own food from inorganic substances, such as carbon dioxide, water, sunlight, ammonia, etc. Within an ecosystem, energy molecules produced by autotrophic organisms are a source of food energy for heterotrophic organisms.

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Choose an example of autotroph.

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Important Questions on Our Environment

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Science>Biology>Our Environment>Components of Environment

Which of the following wavelength of light is absorbed the most for photosynthesis?

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Science>Biology>Our Environment>Components of Environment

Photosynthesis reaction occurs in the presence of _____.

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Science>Biology>Our Environment>Components of Environment

Which of these is the energy conversion that happens in the process called photosynthesis?

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Science>Biology>Our Environment>Components of Environment

The green colour of plant leaves is due to:

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Science>Biology>Our Environment>Components of Environment

The green colour of the plant leaf is due to _____.

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Science>Biology>Our Environment>Components of Environment

Which natural phenomenon conducts carbon dioxide fixation in plants?

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Science>Biology>Our Environment>Components of Environment

In which of the following reactions is oxygen released into air?

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Science>Biology>Our Environment>Components of Environment

Name any two autotrophic plants which also show the heterotrophic mode of nutrition.

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Science>Biology>Our Environment>Components of Environment

What are autotrophs?

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Science>Biology>Our Environment>Components of Environment

All plants are autotrophic in nature. Do you agree? Why/Why not?

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Science>Biology>Our Environment>Components of Environment

There are four organisms A, B, C and D. The organism A eats only the flesh of other animals as food. The organism B can eat grains, fruits and vegetables as well as meat and fish. The organism C can make the food itself from simple inorganic substances present in the environment by utilising sunlight energy. On the other hand, organism D eats only plants and their products as food.

Which organism (C or D) can be a producer?

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Science>Biology>Our Environment>Components of Environment

State the main difference between autotrophs and heterotrophs.

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Science>Biology>Our Environment>Components of Environment

How are autotrophs different from heterotrophs?

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Science>Biology>Our Environment>Components of Environment

The autotrophic mode of nutrition requires

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Science>Biology>Our Environment>Components of Environment