Distinguish between:
$(a)$ Litter and detritus
$(b)$ Primary and secondary productivity

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(N/A) Litter and detritus
Litter Detritus
$1$. Litter contains all kinds of wastes generated above the ground,often including human-made materials. $1$. Detritus is specifically composed of the remains of dead plants (fallen leaves,bark,flowers) and animals (fecal matter,carcasses).
$2$. Litter can contain both biodegradable and non-biodegradable matter (like plastic or glass). $2$. Detritus consists only of organic,biodegradable matter that can be broken down by decomposers.

$(b)$ Primary and secondary productivity
Primary Productivity Secondary Productivity
$1$. It is the amount of organic matter (biomass) produced by producers (green plants) per unit area over a period of time through photosynthesis. $1$. It is the rate of formation of new organic matter by consumers (herbivores and carnivores) over a period of time.

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Explain productivity and its types.

Energy storage at consumer level is called

Net primary productivity $(NPP)$ in an ecosystem is:

On a global basis,the maximum productivity is shown by:

Match List-$I$ with List-$II$ :
List-$I$ (Process)List-$II$ (Definition)
$A$. Productivity$I$. Gross primary productivity minus respiration losses
$B$. Net primary productivity$II$. Rate of formation of new organic matter by consumers
$C$. Gross primary productivity$III$. Rate of biomass production
$D$. Secondary productivity$IV$. Rate of production of organic matter during photosynthesis

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