Match List I with List II : List I List II 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 Choose the correct answer from the options given below:

NPP = GPP - R - Productivity: Rate of biomass production arrow III - Net primary productivity: GPP - R arrow I - Gross primary productivity: Rate of organic matter production during photosynthesis arrow IV - Secondary productivity: Rate of formation of new organic matter by consumers arrow II Matches: A-III, B-I, C-IV, D-II. Correct option is (2). NPP is always GPP minus respiration losses (NPP = GPP - R). B-I immediately singles out option (2) or (3). Secondary productivity is by consumers (D-II), confirming option (2). Class 12 Biology: Ecosystem

Match List I with List II : List I List II A. Productivity I. Gross primary productivity minus respiration losses B. Net primary productivity II. Rate of formation of new organic matter by consumers C

NPP = GPP - R - Productivity: Rate of biomass production arrow III - Net primary productivity: GPP - R arrow I - Gross primary productivity: Rate of organic matter production during photosynthesis arrow IV - Secondary productivity: Rate of formation of new organic matter by consumers arrow II Matches: A-III, B-I, C-IV, D-II. Correct option is (2). NPP is always GPP minus respiration losses (NPP = GPP - R). B-I immediately singles out option (2) or (3). Secondary productivity is by consumers (D-I

Match List I with List II : List I List II 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 Choose the correct answer from the options given below:

NPP = GPP - R - Productivity: Rate of biomass production arrow III - Net primary productivity: GPP - R arrow I - Gross primary productivity: Rate of organic matter production during photosynthesis arrow IV - Secondary productivity: Rate of formation of new organic matter by consumers arrow II Matches: A-III, B-I, C-IV, D-II. Correct option is (2). NPP is always GPP minus respiration losses (NPP = GPP - R). B-I immediately singles out option (2) or (3). Secondary productivity is by consumers (D-II), confirming option (2). Class 12 Biology: Ecosystem

Match List I with List II : List I List II A. Productivity I. Gross primary productivity minus respiration losses B. Net primary productivity II. Rate of formation of new organic matter by consumers C

NPP = GPP - R - Productivity: Rate of biomass production arrow III - Net primary productivity: GPP - R arrow I - Gross primary productivity: Rate of organic matter production during photosynthesis arrow IV - Secondary productivity: Rate of formation of new organic matter by consumers arrow II Matches: A-III, B-I, C-IV, D-II. Correct option is (2). NPP is always GPP minus respiration losses (NPP = GPP - R). B-I immediately singles out option (2) or (3). Secondary productivity is by consumers (D-I

Match List I with List II : List I List II A. Productivity I. Gross primary productivity minus respiration losses B…

Year	2024	Total
Questions	3	3

Year

2024

Total

Questions

	List I		List II
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

List I

List II

Productivity

Gross primary productivity minus respiration losses

Net primary productivity

II.

Rate of formation of new organic matter by consumers

Gross primary productivity

III.

Rate of biomass production

Secondary productivity

IV.

Rate of production of organic matter during photosynthesis

Solution & Explanation

Related Formula

$NPP = GPP - R$ $NPP = GPP - R$

Core Logic

Productivity: Rate of biomass production $arrow$ $\rightarrow$ III
Net primary productivity: $GPP - R$ $GPP - R$ $arrow$ $\rightarrow$ I
Gross primary productivity: Rate of organic matter production during photosynthesis $arrow$ $\rightarrow$ IV
Secondary productivity: Rate of formation of new organic matter by consumers $arrow$ $\rightarrow$ II

Step 1: Match Verification

Matches: A-III, B-I, C-IV, D-II. Correct option is (2).

Pattern Recognition

NPP is always GPP minus respiration losses ( $NPP = GPP - R$ $NPP = GPP - R$). B-I immediately singles out option (2) or (3). Secondary productivity is by consumers (D-II), confirming option (2).

Chapter Mix

Class 12 Biology: Ecosystem

	List-I		List-II
A.	Decomposition	I.	Accumulation of dark coloured amorphous colloidal substance
B.	Detritus	II.	Release of inorganic nutrients by the activity of microbes in soil
C.	Mineralisation	III.	Breaking down of complex organic matter into inorganic substances.
D.	Humification	IV.	Dead remains of plants and animals including fecal matter

Solution

Related Formula

Decomposition processes: Fragmentation, Leaching, Catabolism, Humification, Mineralisation.

Core Logic

Decomposition: Breaking down complex organic matter into inorganic substances $arrow$ $\rightarrow$ III
Detritus: Dead remains of plants/animals including fecal matter $arrow$ $\rightarrow$ IV
Mineralisation: Release of inorganic nutrients by microbial activity $arrow$ $\rightarrow$ II
Humification: Accumulation of dark coloured amorphous substance (humus) $arrow$ $\rightarrow$ I

Step 1: Match Verification

Correct match sequence: A-III, B-IV, C-II, D-I. Correct option is (3).

Pattern Recognition

Humification = Humus accumulation (D-I). Detritus = Dead remains (B-IV). Instantly isolates option (3).

Chapter Mix

Class 12 Biology: Ecosystem

Q149 neet_2024_05_may_morning Ecological Pyramids - Inverted Pyramids

Ecological pyramids represent the relationship between the organisms at different trophic levels and they are generally inverted for:

A. Pyramid of energy in pond ecosystem
B. Pyramid of biomass in sea
C. Pyramid of number in grassland
D. Pyramid of biomass in grassland

Solution

Related Formula

$Pyramid of Biomass in Sea: Biomass of Fishes (Consumers) > Biomass of Phytoplankton (Producers) arrow Inverted$

Core Logic

The pyramid of biomass in a sea/aquatic ecosystem is generally inverted because the biomass of primary producers (phytoplankton) is small compared to that of consumers (zooplankton and fishes) due to the rapid turnover rate of phytoplankton.

Step 1: Checking Other Options

Pyramid of energy is ALWAYS upright in all ecosystems.
Pyramid of number in grassland is upright.
Pyramid of biomass in grassland is upright.

Pattern Recognition

Sees: "inverted ecological pyramid". Shortcut: Pyramid of biomass in sea/ocean is inverted; Pyramid of energy is ALWAYS upright.

Chapter Mix

Class 12 Biology: Ecosystem

Solution & Explanation

Related Formula

Core Logic

Step 1: Match Verification

Pattern Recognition

Chapter Mix

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