Ecosystem PYQ

Given below are two statements: Statement I: In ecosystem, there is unidirectional flow of energy of sun from producers to consumers. Statement II: Ecosystems are exempted from 2nd law of thermodynamics. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: Statement I : The primary source of energy in an ecosystem is solar energy. Statement II : The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP). In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following is the unit of productivity of an Ecosystem?

Which one of the following is not a limitation of ecological pyramids?

Consider the pyramid of energy of an ecosystem given below:  If $T_4$ is equivalent to 1000 J , what is the value at $T_1$ ?

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?

In the equation GPP - R = NPP GPP is Gross Primary Productivity NPP is Net Primary Productivity R here is :

Identify the correct statement: A. Detrivores perform fragmentation. B. The humus is further degraded by some microbes during mineralisation. 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 organism. E. Earthworms break down detritus into smaller particles by a process called catabolism. Choose the correct answer from the options given below:

The amount of nutrients such as carbon, nitrogen, potassium and calcium present in the soil at any given time is referred to as :

Which one of the following will accelerate phosphorus cycle?

Detritivores breakdown detritus into smaller particles. This process is called:

Given below are two statements: Statement $I$: Decomposition is a process in which the detritus is degraded into simpler substances by microbes. Statement $\mathrm{II}$: 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:

The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called:

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

In the equation, $\mathrm{GPP}-R=\mathrm{NPP}$, $R$ represents:

The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as:

Which of the following statements is not correct?

In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

The rate of decomposition is faster in the ecosystem due to following factors $\mathrm{EXCEPT}$:

Which of the following statements is incorrect regarding the phosphorus cycle?

Match the trophic levels with their correct species examples in grassland ecosystem. <table class="pyq-table"><tbody><tr><td>(a)</td><td>Fourth trophic level</td><td>(i)</td><td>Crow</td></tr><tr><td>(b)</td><td>Second trophic level</td><td>(ii)</td><td>Vulture</td></tr><tr><td>(c)</td><td>First trophic level</td><td>(iii)</td><td>Rabbit</td></tr><tr><td>(d)</td><td>Third trophic level</td><td>(iv)</td><td>Grass</td></tr></tbody></table>Select the correct option.

Which of the following statements is incorrect?

Which of the following ecological pyramids is generally inverted?

What type of ecological pyramid would be obtained with following data? Secondary consumer : 120 g Primary consumer : 60 g Primary producer : 10 g