Question

Detritus food chain always begins with ..............

• A. lichens
• B. dead organic matter
• C. phytoplanktons
• D. trees

Hint:

The detritus food chain plays a crucial role in nutrient recycling, starting with the breakdown of dead organic matter by decomposers.

Answer 1

The Correct Option is B

Step 1: Understanding detritus food chain.
A detritus food chain begins with dead organic matter, which is broken down by decomposers such as fungi and bacteria. This process is a key part of the ecosystem, recycling nutrients.
Step 2: Analyzing the options.
(A) lichens: Incorrect, lichens are primary producers, not the start of a detritus food chain.
(B) dead organic matter: Correct, detritus food chains begin with dead organic matter, which is decomposed by microorganisms.
(C) phytoplanktons: Incorrect, phytoplanktons are part of the grazing food chain, not the detritus food chain.
(D) trees: Incorrect, trees are part of the producer-consumer food chain, not the detritus food chain.
Step 3: Conclusion.
The correct answer is (B) dead organic matter, as it is the starting point of a detritus food chain.