In an ecosystem, if the Net Primary Productivity (NPP) of first trophic level is $$100 x\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) \mathrm{yr}^{-1},$$ what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
1. $$x\left(\mathrm{kcal}~ \mathrm{m}^{-2}\right) y r^{-1}$$
2. $$10 x\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) \mathrm{yr}^{-1}$$
3. $$\dfrac{100 x}{3 x}\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) \mathrm{yr}^{-1}$$
4. $$\dfrac{x}{10}\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) y r^{-1}$$
Subtopic:  Ecosystem Productivity | Energy Flow |
From NCERT
NEET - 2024
Hints

Match List-I with List-II:
 List-I List-II A. Tertiary consumer I. Grass B. Secondary consumer II. Lion C. Primary consumer III. Wolf D. Primary producer IV. Goat

Choose the correct answer from the options given below:
1. A-I, B-II, C-III, D-IV
2. A-III, B-IV, C-II, D-I
3. A-III, B-II, C-IV, D-I
4. A-II, B-III, C-IV, D-I
Subtopic:  Ecological Flow |
85%
From NCERT
NEET - 2024
Hints

Given below are two statements
 Statement I: The rate of decomposition is not related to chemical composition of detritus and climatic factors. Statement II: In a particular climatic condition, decomposition rate is faster if detritus is rich in lignin and chitin.
In light of the above statements, choose the correct answer from the options given below:
1. Both Statement I and Statement II are True
2. Both Statement I and Statement II are False
3. Statement I is True but Statement II is False
4. Statement I is False but Statement II is True
Subtopic:  Decomposition |
80%
From NCERT
NEET - 2024
Hints

 1 It can vary from small sized pond to large sized sea 2 It may be anthropogenic in origin 3 It may be temporary or Permanent 4 It involves the function of flow of energy but not recycling of nutrients
Subtopic:  Introduction |
82%
From NCERT
NEET - 2024
Hints

Consider the pyramid of energy of an ecosystem given below :

If $$\text T_4$$ is equivalent to $$1000~\text J,$$ what is the value of T1?
 1 $$\dfrac{ 1000 }{10}~\text J$$ 2 $$\dfrac{ 1000}{10} \times 4~\text J$$ 3 $$10,000~\text J$$ 4 $$10,00,000~\text J$$
Subtopic:  Energy Flow |
85%
From NCERT
NEET - 2024
Hints

Which one of the following is not a limitation of ecological pyramids?
 1 Saprophytes are not given any place in ecological pyramids 2 It assumes a simple food chain that, almost, never exists in nature 3 It accommodates a food web 4 It does not take into account the same species belonging to two or more trophic levels
Subtopic:  Ecological Pyramids |
73%
From NCERT
NEET - 2024
Hints

In the equation

GPP is Gross Primary Productivity. NPP is net Primary Productivity. R here is ___________
1. Reproductive allocation
3. Respiratory quotient
4. Respiratory loss
Subtopic:  Ecosystem Productivity |
86%
From NCERT
NEET - 2023
Hints

Identify the correct statements:
 A: Detrivores perform fragmentation. B: The humus is further degraded by some microbes during mineralization. C: Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching. D: The detritus food chain begins with living organisms. E: Earthworms break down detritus into smaller particles by a process called catabolism.

Choose the correct answer from the options given below:
 1 D, E, A only 2 A, B, C only 3 B, C, D only 4 C, D, E only
Subtopic:  Decomposition |
81%
From NCERT
NEET - 2023
Hints

Given below are two statements:
 Statement I: Decomposition is a process in which the detritus is degraded into simpler substances by microbes. Statement II: Decomposition is faster if the detritus is rich in lignin and chitin.

In light of the above statements, choose the correct answer from the options given below:
 1 Statement I is incorrect but Statement II is correct. 2 Both Statement I and Statement II are correct. 3 Both Statement I and Statement II are incorrect. 4 Statement I is correct but Statement II is incorrect.
Subtopic:  Decomposition |
75%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Detritivores breakdown detritus into smaller particles. This process is called:
 1. Decomposition 2. Catabolism 3. Fragmentation 4. Humification
Subtopic:  Decomposition |
78%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch