Why do producers always occupy the first trophic level on every food chain?

Monjur Alahi

Why do  producers always occupy the first trophic level on every food chain?


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Salim Ahmed Kawsar

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Because producers (plants) have the ability to trap solar energy with the help of chlorophyll.

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In a food chain, the third trophic level is always occupied by : 

(A) carnivores

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What does a food chain always start with ? 

(C) Producer

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The transfer of energy from one trophic level to other trophic level

(D) 10 – 20 %

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In the food chain below, if the amount of energy available at fourth trophic level is 5 KJ, what is the

Answer is (C) 5000 KJ

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The tendency of pollutants to concentrate as they move from one trophic level to the next is …………

B) Bio – magnification

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In an ecosystem, the food chain always starts with

The correct answer is A) Producers

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Trophic level in an ecosystem represents the 

(B) Energy level

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The second trophic level in a lake is …….

(b) Zooplankton

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Name an omnivore which occurs in both grazing food chain and the decomposer food chain.

Sparrow/crow.

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What will happen to an ecosystem if a. All producers are removed; b. All organisms of herbivore level are eliminated;

(a) Reduction in primary productivity. No biomass available for consumption by higher trophic levels/heterotrophs (b) Increase in primary productivity and biomass of producers. Carnivores population will subsequently dwindle due to food...

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