Q49. With reference to the food chain, consider the following statements
1. A food chain represents only one part of the food or energy flow.
2. Grazing food chain and Detritus food chain both are linked.
3. A food chain always starts from a living plant.
Which of the above statement(s) is/are correct?

(a) Only 1 and 2

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(b) Only 2

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(d) Only 3

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Solution

The correct option is A (a) Only 1 and 2
Grazing food chain
The consumers which start the food chain, utilising the plant or plant part as their food constitute the grazing food chain. This food chain begins from green plants at the base and the primary consumer is herbivore.
Detritus food chain
It starts from dead organic matter of decaying animals and plant bodies consumed by the micro-organisms and then to detritus feeding organism called detrivores or decomposer and to other predators

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Similar questions

With reference to the food chain, consider the following statements
1. A food chain represents only one part of the food or energy flow.
2. Grazing food chain and Detritus food chain both are linked.
3. A food chain always starts from a living plant.
Which of the above statement(s) is/are correct?

खाद्य श्रृंखला के संदर्भ में, निम्नलिखित कथनों पर विचार करें
1. खाद्य श्रृंखला भोजन या ऊर्जा प्रवाह के केवल एक हिस्से का दर्शाती है।
2. चारण खाद्य श्रृंखला तथा डेट्राइटस खाद्य श्रृंखला दोनों जुड़े हुए हैं।
3. खाद्य श्रृंखला हमेशा एक जीवित पौधे से प्रारम्भ होती है।
उपरोक्त कथन में से कौन सा/से सही है/हैं?

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

I. Food chains can never occur independently in an ecosystem and various food chains are interconnected with each other forming an interlocked system known as the food web.
II. Grazing food chains and detritus food chains are linked to each other.
III. A food chain always starts with a living plant.

Q. Which of the following statements regarding energy flow is/are false?
I. Detritus food chain begins with dead organic matter
II. In aquatic ecosystem, detritus food chain is the major conduit for energy flow
III. In terrestrial ecosystem a larger fraction of energy flows through grazing food chain
IV. Producers belong to the first trophic level of the food chain

Q. Read the following statements (1 - 3) related food chain and select the correct statement/s ?

1. Food chains have multiple paths interconnecting plants and animals.
2. Grazing food chain begins with the degradation of organic matter.
3. In aquatic ecosystems, the grazing food chain accounts for major conduits of the energy flow.

Q. Why a much larger fraction of energy flows from detritus food chain than from grazing food chain in terrestrial ecosystem?

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