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Food Chains

How can plant...

Question

How can plants make food without light?(Hydrothermal vents discovered in 1970's create a food chain independent of sunlight)

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Solution

There are some bacterias (chemoautotrophic) in hydrothermal vents which do not need light and use chemical energy to make food. But, plants are photoautotrophic only as they require light only.

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Q. The following is a food chain that ends with human :
plants → bee → human
(a) Explain how plants provide food for bees.
(b) How do bees provide food for humans?
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(d) Do you think that the food chain given in this question can really be regarded as a food chain? Explain your answer.

Q. Read the following statements (I - III) and select the correct statements related to the food chain?

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II. Grazing food chains and detritus food chains are linked to each other.
III. A food chain always starts with a living plant.

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