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Consider the following statements and select the correct option that fills in the blanks.
I. A ___ food chain begins with dead organic matter.
II. In xerarch succession, the series progress from _ conditions.
III. Breaking down of detritus into small particles by earthworm is called ___.
I II III
(a) grazing xeric to mesic catabolism
(b) detritus xeric to mesic fragmentation
(c) detritus mesic to xeric mineralisation
(d) parasitic mesic to xeric humification

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answer is B.

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Detailed Solution

Food chain starting with dead organic matter is termed as a detritus food chain (DFC).

Xerarch succession takes place in dry areas and the series progress from xeric to mesic conditions.

Breaking down of detritus into small particles by earthworm is called fragmentation.

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